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A288878
Primes of the form k!3 + 3^2, where k!3 is the triple factorial number (A007661).
1
11, 13, 19, 37, 89, 12329, 209449, 1106569, 24344329, 96342409, 2504902409, 17961239296009, 52580450364682240009, 2295148179742698933452800009, 7825229077844441903818866688000009, 145302140752338100885902776123355299840000009
OFFSET
1,1
LINKS
MATHEMATICA
MultiFactorial[n_, k_] := If[n<1, 1, n*MultiFactorial[n-k, k]];
Select[Table[MultiFactorial[i, 3] + 3^2, {i, 0, 100}], PrimeQ[#]&]
CROSSREFS
Cf. A247865.
Sequence in context: A167497 A068579 A048519 * A102907 A235479 A089774
KEYWORD
nonn
AUTHOR
Robert Price, Jun 18 2017
STATUS
approved