A090229 Differences between consecutive nonprime Fibonacci numbers (A090206).

1, 0, 7, 13, 13, 21, 89, 233, 233, 377, 1597, 1597, 2584, 4181, 6765, 28657, 28657, 46368, 75025, 121393, 514229, 514229, 832040, 1346269, 2178309, 3524578, 5702887, 9227465, 14930352

Offset

0,3

Links

Table of n, a(n) for n=0..28.

Formula

F(0) = 0; F(1) = 1; F(n) = F(n-1) + F(n-2); F(0:9) = 0, 1, 1, 2, 3, 5, 8, 13, 21, 34 nonprimes: 0, 1, 1, 8, 21 differences between consecutive nonprimes: 1, 0, 7, 13

Crossrefs

Cf. A090206.

Sequence in context: A352444 A145009 A352352 * A259222 A204713 A241985

Adjacent sequences: A090226 A090227 A090228 * A090230 A090231 A090232

Keyword

easy,nonn

Author

Felix Tubiana, Jan 22 2004

Status

approved