A288409 Primes of the form k!2+64, where k!2 is the double factorial number (A006852).

67, 79, 1009, 10459, 34459489, 654729139, 316234143289, 2980227913743310874726229193921939

Offset

1,1

Comments

The next term has 211 digits. - Harvey P. Dale, Feb 07 2019

Links

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

Henri& Renaud Lifchitz, PRP Records.Search for n!2+64.

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] + 64, {i, 0, 100}], PrimeQ[#]&]
Select[Range[100]!!+64, PrimeQ] (* Harvey P. Dale, Feb 07 2019 *)

Crossrefs

Cf. A076193.

Sequence in context: A173040 A091490 A091075 * A139973 A118741 A217115

Adjacent sequences: A288406 A288407 A288408 * A288410 A288411 A288412

Keyword

nonn

Author

Robert Price, Jun 08 2017

Status

approved