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A289823
Primes of the form k!3-6561, where k!3 is the triple factorial number (A007661).
1
51679, 202879, 4182239, 608601439, 2504895839, 81359229945439, 664565853945439, 262134882788466681439, 2103662445439858602854085842728187330559993439, 17994728558292550488813850298696914425610239993439
OFFSET
1,1
LINKS
MATHEMATICA
MultiFactorial[n_, k_] := If[n<1, 1, n*MultiFactorial[n-k, k]];
Select[Table[MultiFactorial[i, 3] - 6561, {i, 14, 100}], PrimeQ[#]&]
CROSSREFS
Cf. A261344.
Sequence in context: A344644 A344645 A203354 * A147530 A184454 A003134
KEYWORD
nonn
AUTHOR
Robert Price, Jul 12 2017
STATUS
approved