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A289859
Primes of the form k!2-2, where k!2 is the sextuple factorial number (A085158).
1
13, 103, 2027023, 34459423, 654729073, 2980227913743310874726229193921873, 174865344543353986303948473285124243127671456831640623, 352999527454840466971061863960307904899505075341088595453568994140623
OFFSET
1,1
LINKS
MATHEMATICA
MultiFactorial[n_, k_] := If[n<1, 1, n*MultiFactorial[n-k, k]];
Select[Table[MultiFactorial[i, 2] - 2, {i, 3, 100}], PrimeQ[#]&]
CROSSREFS
Sequence in context: A087398 A080440 A159352 * A129762 A283121 A278555
KEYWORD
nonn
AUTHOR
Robert Price, Jul 13 2017
STATUS
approved