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A289855
Primes of the form k!2-128, where k!2 is the double factorial number (A006852).
1
10267, 135007, 13749310447, 1192568192774434123539907640497, 29215606371473169285018060091249259296747, 1009847364737869270905302433221592504062302663202724609247, 34720596058582394465875230149026168047833371128291024141249287753332469144201839599609247
OFFSET
1,1
LINKS
MATHEMATICA
MultiFactorial[n_, k_] := If[n<1, 1, n*MultiFactorial[n-k, k]];
Select[Table[MultiFactorial[i, 2] - 128, {i, 8, 100}], PrimeQ[#]&]
Select[Range[8, 120]!!-128, PrimeQ] (* Harvey P. Dale, Dec 01 2018 *)
CROSSREFS
Cf. A257864.
Sequence in context: A252031 A356979 A187311 * A204691 A270762 A200712
KEYWORD
nonn
AUTHOR
Robert Price, Jul 13 2017
STATUS
approved