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

Author

Robert Price, Jun 08 2017

Keywords

• nonn

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

Crossrefs

Cf. A076190.

Programs

Mathematica

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