A059709 - OEIS

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A059709

Numbers k such that A003266(k) - 1 is prime.

4, 5, 6, 7, 8, 14, 15

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,1

COMMENTS

The a(n)-th almost-Fibonorial number is prime.

If it exists, a(8) > 1300. - Michael S. Branicky, Aug 17 2024

LINKS

Table of n, a(n) for n=1..7.

C. K. Caldwell, Fibonacci Numbers.

Eric Weisstein's World of Mathematics, Fibonorial.

MATHEMATICA

a = 1; Do[ a = a*Fibonacci[n]; If[ PrimeQ[a - 1], Print[n] ], {n, 1, 247} ]

CROSSREFS

Cf. A003266, A053408.

Sequence in context: A050038 A285218 A380269 * A344580 A071623 A274552

Adjacent sequences: A059706 A059707 A059708 * A059710 A059711 A059712

KEYWORD

nonn,more

AUTHOR

Robert G. Wilson v, Feb 07 2001

EXTENSIONS

Definition corrected by Daniel Forgues, Nov 29 2009

Name edited by Michel Marcus, Jan 17 2024

STATUS

approved

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