OFFSET
1,1
LINKS
Harvey P. Dale, Table of n, a(n) for n = 1..17
Henri& Renaud Lifchitz, PRP Records.Search for n!4+256.
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] + 256, {i, 0, 100}], PrimeQ[#]&]
Select[Table[256+Times@@Range[n, 1, -4], {n, 200}], PrimeQ] (* Harvey P. Dale, Nov 04 2024 *)
CROSSREFS
KEYWORD
nonn,changed
AUTHOR
Robert Price, Sep 02 2017
STATUS
approved