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A289560
Primes of the form k!4+256, where k!4 is the quadruple factorial number (
A007662
).
1
257, 277, 487, 1267389841, 50491808745015763381, 1008407509171875041482378381, 429215532868726286171043772444743140881, 4551830726072842264843919206776501006328381
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OFFSET
1,1
LINKS
Robert Price,
Table of n, a(n) for n = 1..10
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[#]&]
CROSSREFS
Cf.
A291349
.
Sequence in context:
A288411
A060879
A062382
*
A256776
A252279
A105345
Adjacent sequences:
A289557
A289558
A289559
*
A289561
A289562
A289563
KEYWORD
nonn
AUTHOR
Robert Price
, Sep 02 2017
STATUS
approved
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Last modified May 10 03:34 EDT 2024. Contains 372354 sequences. (Running on oeis4.)