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A090208 Partial sums of sequence (A090206) of consecutive nonprime Fibonacci numbers. 0
1, 2, 9, 29, 55, 89, 199, 521, 987, 1597, 3571, 6765, 10946, 17711, 28657, 64079, 121393, 196418, 317811, 514229, 1149851, 2178309, 3524578, 5702887, 9227465, 14930352, 24157817, 39088169, 63245986, 102334155 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

LINKS

Table of n, a(n) for n=0..29.

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 sums of consecutive nonprimes: 1, 2, 9, 29

MATHEMATICA

Total /@ Partition[ Select[Fibonacci /@ Range[0, 40], ! PrimeQ[#] &], 2, 1] (* Seth A. Troisi, May 14 2022 *)

CROSSREFS

Cf. A090206, A000045.

Sequence in context: A110377 A338436 A041877 * A123058 A212272 A062452

Adjacent sequences: A090205 A090206 A090207 * A090209 A090210 A090211

KEYWORD

easy,nonn

AUTHOR

Felix Tubiana, Jan 22 2004

EXTENSIONS

a(29) corrected by Seth A. Troisi, May 13 2022

STATUS

approved

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Last modified December 4 07:01 EST 2022. Contains 358544 sequences. (Running on oeis4.)