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A288884 Primes of the form k!3 + 3^8, where k!3 is the triple factorial number (A007661). 1
6563, 6571, 6841, 2504908961, 17961239302561, 81359229958561, 664565853958561, 2295148179742698933452806561, 628962407176689215723405312006561, 43414370923880963682387072385024006561, 116346745870073113470947277571643877742200278220800006561 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Robert Price, Table of n, a(n) for n = 1..18

Henri& Renaud Lifchitz, PRP Records.Search for n!3+3^8.

Joe McLean, Interesting Sources of Probable Primes

OpenPFGW Project, Primality Tester

MATHEMATICA

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

Select[Table[MultiFactorial[i, 3] + 3^8, {i, 0, 100}], PrimeQ[#]&]

CROSSREFS

Cf. A264867.

Sequence in context: A017432 A017564 A031579 * A031759 A145050 A256837

Adjacent sequences:  A288881 A288882 A288883 * A288885 A288886 A288887

KEYWORD

nonn

AUTHOR

Robert Price, Jun 18 2017

STATUS

approved

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Last modified January 22 08:47 EST 2018. Contains 298042 sequences.