A288412 Primes of the form k!2+512, where k!2 is the double factorial number (A006852).

617, 135647, 2027537, 654729587, 7905853581137, 370285001030422820361936176659518850400275455268246313217966819668512968338481634393678502844088430422210693359887

Offset

1,1

Links

Robert Price, Table of n, a(n) for n = 1..8

Henri& Renaud Lifchitz, PRP Records.Search for n!2+512.

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] + 512, {i, 0, 100}], PrimeQ[#]&]

Crossrefs

Cf. A076196.

Sequence in context: A350083 A275739 A108818 * A234559 A251323 A020377

Adjacent sequences: A288409 A288410 A288411 * A288413 A288414 A288415

Keyword

nonn

Author

Robert Price, Jun 08 2017

Status

approved