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A290376 Prime Fubini numbers. 1
3, 13, 541, 47293, 7087261, 526858348381 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Corresponding indices are 2, 3, 5, 7, 9, 13, ... with no more up to 12000.

LINKS

Table of n, a(n) for n=1..6.

MATHEMATICA

a[0] = 1; a[n_] := a[n] = Sum[Binomial[n, k]*a[n - k], {k, 1, n}]; Select[a@# & /@ Range@ 20, PrimeQ@# &]

PROG

(PARI) lista(nn) = for (n=1, nn, if (isprime(fn=sum(k=1, n, k!*stirling(n, k, 2))), print1(fn, ", ")); ); \\ Michel Marcus, Aug 02 2017

CROSSREFS

Cf. A000670.

Sequence in context: A092845 A216474 A222762 * A089711 A173759 A001039

Adjacent sequences:  A290373 A290374 A290375 * A290377 A290378 A290379

KEYWORD

nonn,more

AUTHOR

Amiram Eldar, Jul 28 2017

STATUS

approved

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Last modified August 4 07:32 EDT 2020. Contains 336201 sequences. (Running on oeis4.)