A053408 Numbers n such that A003266(n) + 1 is prime.

1, 2, 3, 4, 5, 6, 7, 8, 22, 28

Offset

1,2

Comments

Next term > 300. - Joerg Arndt, Aug 16 2014

The corresponding primes are given in A053413. - Joerg Arndt, Aug 17 2014

If it exists, a(11) > 1100. - Robert Price, May 27 2019

Links

Table of n, a(n) for n=1..10.

C. K. Caldwell, Fibonacci Numbers

Eric Weisstein's World of Mathematics, Fibonacci Number.

Eric Weisstein's World of Mathematics, Fibonorial

Mathematica

Select[Range[30], PrimeQ[Fibonorial[#] + 1] &] (* Robert Price, May 26 2019 *)

Prog

(PARI) ff(n)=prod(i=1, n, fibonacci(i));
for(n=1, 10^6, if(ispseudoprime(ff(n)+1), print1(n, ", "))); \\ Joerg Arndt, Aug 16 2014

Crossrefs

Cf. A000040, A000045, A003266, A053412, A053413.

Sequence in context: A371260 A215888 A240963 * A269355 A269357 A335900

Adjacent sequences: A053405 A053406 A053407 * A053409 A053410 A053411

Keyword

nonn,more

Author

G. L. Honaker, Jr., Jan 08 2000

Extensions

Definition edited by Daniel Forgues, Nov 29 2009

Edited definition, Joerg Arndt, Aug 17 2014

Status

approved