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A288371 Primes of the form k!9+1, where k!9 is the nonuple factorial number (A114806). 1
2, 3, 5, 7, 11, 23, 37, 53, 71, 113, 137, 163, 191, 757, 2161, 2801, 51521, 1418561, 4093601, 42456961, 69509441, 105616001, 2420046721, 9160905601, 1270453824641, 2326680294401, 190787784140801, 509498986796801, 2805949277824001, 612940220628736001 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Robert Price, Table of n, a(n) for n = 1..55

OpenPFGW Project, Primality Tester

MATHEMATICA

MultiFactorial[n_, k_] := If[n<1, 1, n*MultiFactorial[n-k, k]];

Select[Table[MultiFactorial[i, 9] + 1, {i, 0, 100}], PrimeQ[#]&]

CROSSREFS

Cf. A204660.

Sequence in context: A068853 A328076 A236400 * A158217 A030284 A252791

Adjacent sequences:  A288368 A288369 A288370 * A288372 A288373 A288374

KEYWORD

nonn

AUTHOR

Robert Price, Jun 08 2017

STATUS

approved

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Last modified December 2 01:47 EST 2021. Contains 349435 sequences. (Running on oeis4.)