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A288880
Primes of the form k!3 + 3^4, where k!3 is the triple factorial number (A007661).
1
83, 109, 12401, 58321, 24344401, 96342481, 2504902481, 26582634158080081, 1143053268797440081, 262134882788466688081, 427380210218181008588800081, 142299187144047333874073600081, 7825229077844441903818866688000081
OFFSET
1,1
LINKS
MATHEMATICA
MultiFactorial[n_, k_] := If[n<1, 1, n*MultiFactorial[n-k, k]];
Select[Table[MultiFactorial[i, 3] + 3^4, {i, 0, 100}], PrimeQ[#]&]
Select[Table[Times@@Range[n, 1, -3]+81, {n, 100}], PrimeQ] (* Harvey P. Dale, Aug 13 2021 *)
CROSSREFS
Cf. A247866.
Sequence in context: A033252 A347226 A261449 * A126117 A096279 A340817
KEYWORD
nonn
AUTHOR
Robert Price, Jun 18 2017
STATUS
approved