A288408 Primes of the form k!2+32, where k!2 is the double factorial number (A006852).

47, 137, 977, 10427, 2027057, 13749310607, 6332659870762850657, 13113070457687988603440657, 563862029680583509947946907, 25373791335626257947657609407, 488960130368663401543922783473071784646213671907

Offset

1,1

Links

Robert Price, Table of n, a(n) for n = 1..13

Henri& Renaud Lifchitz, PRP Records.Search for n!2+32.

Joe McLean, Interesting Sources of Probable Primes

OpenPFGW Project, Primality Tester

Mathematica

MultiFactorial[n_, k_] := If[n<1, 1, n*MultiFactorial[n-k, k]];
Select[Table[MultiFactorial[i, 2] + 32, {i, 0, 100}], PrimeQ[#]&]

Crossrefs

Cf. A076190.

Sequence in context: A350863 A253225 A039530 * A095311 A005112 A355727

Adjacent sequences: A288405 A288406 A288407 * A288409 A288410 A288411

Keyword

nonn

Author

Robert Price, Jun 08 2017

Status

approved