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A121568 Fibonacci[ (p - 1)/2 ], where p = Prime[n]. 3
1, 1, 2, 5, 8, 21, 34, 89, 377, 610, 2584, 6765, 10946, 28657, 121393, 514229, 832040, 3524578, 9227465, 14930352, 63245986, 165580141, 701408733, 4807526976, 12586269025, 20365011074, 53316291173, 86267571272, 225851433717 (list; graph; refs; listen; history; text; internal format)
OFFSET

2,3

COMMENTS

p = Prime[n] divides a(n) = Fibonacci[(p-1)/2] for p = {29,41,61,89,101,109,149,181,229,241,269,281,349,381,...} = A033205[n] Primes of form x^2+5*y^2 excluding A033205[1] = 5.

LINKS

Table of n, a(n) for n=2..30.

FORMULA

a(n) = Fibonacci[ (Prime[n]-1)/2 ], n>1.

MATHEMATICA

Table[Fibonacci[(Prime[n]-1)/2], {n, 2, 50}]

CROSSREFS

Cf. A000045, A121567, A033205, A045468, A064739.

Sequence in context: A200276 A168081 A117647 * A276464 A001005 A009735

Adjacent sequences:  A121565 A121566 A121567 * A121569 A121570 A121571

KEYWORD

nonn

AUTHOR

Alexander Adamchuk, Aug 07 2006

STATUS

approved

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Last modified October 20 16:06 EDT 2018. Contains 316390 sequences. (Running on oeis4.)