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A090228 Products of consecutive members of A090206 (nonprime Fibonacci numbers). 0
0, 1, 8, 168, 714, 1870, 7920, 54288, 229970, 602070, 2550408, 10803704, 28284465, 74049690, 193864606, 821223648, 3478759200, 9107509825, 23843770274, 62423800998, 264431464440, 1120149658760, 2932589879121, 7677619978602 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,3

LINKS

Table of n, a(n) for n=0..23.

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 product of consecutive nonprimes: 1, 8, 168

a(n) = A090206(n)*A090206(n+1). - David Wasserman, Oct 13 2005

CROSSREFS

Cf. A090206, A000045

Sequence in context: A032395 A316756 A294512 * A220808 A221022 A039699

Adjacent sequences:  A090225 A090226 A090227 * A090229 A090230 A090231

KEYWORD

easy,nonn

AUTHOR

Felix Tubiana (fat2(AT)columbia.edu), Jan 22 2004

EXTENSIONS

More terms from David Wasserman, Oct 13 2005

STATUS

approved

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Last modified September 20 12:05 EDT 2021. Contains 347586 sequences. (Running on oeis4.)