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  2. Fibonacci sequence - Wikipedia

    en.wikipedia.org/wiki/Fibonacci_sequence

    Fibonacci sequence. In mathematics, the Fibonacci sequence is a sequence in which each number is the sum of the two preceding ones. Numbers that are part of the Fibonacci sequence are known as Fibonacci numbers, commonly denoted Fn . The sequence commonly starts from 0 and 1, although some authors start the sequence from 1 and 1 or sometimes ...

  3. Triangular number - Wikipedia

    en.wikipedia.org/wiki/Triangular_number

    Triangular numbers are a type of figurate number, other examples being square numbers and cube numbers. The n th triangular number is the number of dots in the triangular arrangement with n dots on each side, and is equal to the sum of the n natural numbers from 1 to n. The sequence of triangular numbers, starting with the 0th triangular number ...

  4. List of integer sequences - Wikipedia

    en.wikipedia.org/wiki/List_of_integer_sequences

    A Harshad number in base 10 is an integer that is divisible by the sum of its digits (when written in base 10). A005349: Factorions: 1, 2, 145, 40585, ... A natural number that equals the sum of the factorials of its decimal digits. A014080: Circular primes: 2, 3, 5, 7, 11, 13, 17, 37, 79, 113, ...

  5. Numeral system - Wikipedia

    en.wikipedia.org/wiki/Numeral_system

    Numeral systems. A numeral system is a writing system for expressing numbers; that is, a mathematical notation for representing numbers of a given set, using digits or other symbols in a consistent manner. The same sequence of symbols may represent different numbers in different numeral systems. For example, "11" represents the number eleven in ...

  6. Angel number 444: Why seeing this pattern means you're ... - AOL

    www.aol.com/news/angel-number-444-why-seeing...

    The angel number 444 meaning has to do with change and transformation. ... According to Wilder, you can't avoid the energy of fours, unlike other number patterns that can be mindlessly ignored.

  7. List of types of numbers - Wikipedia

    en.wikipedia.org/wiki/List_of_types_of_numbers

    Ternary: The base-three numeral system with 0, 1, and 2 as digits. Quaternary: The base-four numeral system with 0, 1, 2, and 3 as digits. Hexadecimal: Base 16, widely used by computer system designers and programmers, as it provides a more human-friendly representation of binary-coded values.

  8. Pascal's triangle - Wikipedia

    en.wikipedia.org/wiki/Pascal's_triangle

    A similar pattern is observed relating to squares, as opposed to triangles. To find the pattern, one must construct an analog to Pascal's triangle, whose entries are the coefficients of (x + 2) row number, instead of (x + 1) row number. There are a couple ways to do this. The simpler is to begin with row 0 = 1 and row 1 = 1, 2.

  9. Angel Number 888: Why seeing this number could mean ... - AOL

    www.aol.com/news/angel-number-888-why-seeing...

    These number patterns could hold a special message or meaning in your life, or they might be a sign from your angels that you're right where you need to be. Here’s what to know about 888 ...

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