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A289857
Primes of the form k!2-512, where k!2 is the double factorial number (
A006852
).
1
433, 9883, 13749310063, 316234142713, 25373791335626257947657608863, 7297912393562140321551086320493608726062890113, 79777941814291672401518892224505807820921910393015244140113
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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!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, 9, 100}], PrimeQ[#]&]
CROSSREFS
Cf.
A258452
.
Sequence in context:
A142539
A059665
A059664
*
A198450
A241925
A108832
Adjacent sequences:
A289854
A289855
A289856
*
A289858
A289859
A289860
KEYWORD
nonn
AUTHOR
Robert Price
, Jul 13 2017
STATUS
approved
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Last modified September 16 12:57 EDT 2024. Contains 375976 sequences. (Running on oeis4.)