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A059709
Numbers k such that A003266(k) - 1 is prime.
3
4, 5, 6, 7, 8, 14, 15
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
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
Sequence in context: A047567 A050038 A285218 * A344580 A071623 A274552
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