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Numbers that are part of the Fibonacci sequence are known as Fibonacci numbers, ... This property can be understood in terms of the continued fraction ...
A repfigit, or Keith number, is an integer such that, when its digits start a Fibonacci sequence with that number of digits, the original number is eventually reached. An example is 47, because the Fibonacci sequence starting with 4 and 7 (4, 7, 11, 18, 29, 47) reaches 47.
Abu Kamil (c. 850–930) employed it in his geometric calculations of pentagons and decagons; his writings influenced that of Fibonacci (Leonardo of Pisa) (c. 1170–1250), who used the ratio in related geometry problems but did not observe that it was connected to the Fibonacci numbers.
For generalized Fibonacci sequences (satisfying the same recurrence relation, but with other initial values, e.g. the Lucas numbers) the number of occurrences of 0 per cycle is 0, 1, 2, or 4. The ratio of the Pisano period of n and the number of zeros modulo n in the cycle gives the rank of apparition or Fibonacci entry point of n .
Inspired by a similar Stolarsky array previously defined by Stolarsky (1977), Morrison (1980) defined the Wythoff array as follows. Let = + denote the golden ratio; then the th winning position in Wythoff's game is given by the pair of positive integers (⌊ ⌋, ⌊ ⌋), where the numbers on the left and right sides of the pair define two complementary Beatty sequences that together include ...
A prime divides if and only if p is congruent to ±1 modulo 5, and p divides + if and only if it is congruent to ±2 modulo 5. (For p = 5, F 5 = 5 so 5 divides F 5) . Fibonacci numbers that have a prime index p do not share any common divisors greater than 1 with the preceding Fibonacci numbers, due to the identity: [6]
3 Properties. 4 Identities. 5 Combinatorial interpretation. ... The sums of the coefficients are the Fibonacci numbers. If F(n,k) is the coefficient of x k in F n (x ...
This number, also called the silver ratio, is present in a great number of properties listed below. The number of self-similarities at level n is a Fibonacci number \ −1. (more precisely: +). The curve encloses an infinity of square structures of decreasing sizes in a ratio + (see figure). The number of those square structures is a Fibonacci ...