A289492 Primes of the form k!4+16, where k!4 is the quadruple factorial number (A007662).

17, 19, 37, 61, 601, 65851, 40883551, 44358635491, 184874815141, 200200021673987500790641, 2442358029135994033939891, 13005556505149168230729834391, 85277434004263096088895523996891, 47579595706543208754134106245953141

Offset

1,1

Links

Robert Price, Table of n, a(n) for n = 1..18

Henri& Renaud Lifchitz, PRP Records.Search for n!4+16.

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, 4] + 16, {i, 0, 100}], PrimeQ[#]&]

Crossrefs

Cf. A291344.

Sequence in context: A191043 A306510 A129805 * A262286 A108024 A095081

Adjacent sequences: A289489 A289490 A289491 * A289493 A289494 A289495

Keyword

nonn

Author

Robert Price, Sep 02 2017

Status

approved