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A289821
Primes of the form k!3-729, where k!3 is the triple factorial number (A007661).
1
151, 2504901671, 664565853951271, 3091650738175271, 26582634158079271, 126757680265215271, 142299187144047333874073599271, 546216992715109618958387336810111087297326406997164406744285183999999999271
OFFSET
1,1
LINKS
MATHEMATICA
MultiFactorial[n_, k_] := If[n<1, 1, n*MultiFactorial[n-k, k]];
Select[Table[MultiFactorial[i, 3] - 729, {i, 11, 100}], PrimeQ[#]&]
CROSSREFS
Cf. A247466.
Sequence in context: A206362 A200934 A174759 * A234348 A185394 A097640
KEYWORD
nonn
AUTHOR
Robert Price, Jul 12 2017
STATUS
approved