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A288376
Primes of the form k!2+2, where k!2 is the double factorial number (A006852).
1
3, 5, 17, 107, 947, 13749310577, 316234143227, 213458046676877, 495179769008019818390136611716089140627, 13114900840751548972796135496384318234575359262373046877, 28352254429826839019508359891905756542124154226667992913078222750278633810791015627
OFFSET
1,1
LINKS
MATHEMATICA
MultiFactorial[n_, k_] := If[n<1, 1, n*MultiFactorial[n-k, k]];
Select[Table[MultiFactorial[i, 2] + 2, {i, 0, 100}], PrimeQ[#]&]
CROSSREFS
Cf. A076815.
Sequence in context: A087858 A191222 A084723 * A096178 A348430 A107312
KEYWORD
nonn
AUTHOR
Robert Price, Jun 08 2017
STATUS
approved