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A289852
Primes of the form k!2-16, where k!2 is the double factorial number (
A006852
).
1
89, 929, 135119, 34459409, 7905853580609, 669325572332691496707919692320662308340434243618803739488329723923351785805848442856791239207612629457179653299076271283
992814866750698368061459208762618124485015869140609
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OFFSET
1,1
LINKS
Robert Price,
Table of n, a(n) for n = 1..7
Henri & Renaud Lifchitz,
PRP Records.Search for n!2-16.
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, 2] - 16, {i, 6, 100}], PrimeQ[#]&]
CROSSREFS
Cf.
A258616
.
Sequence in context:
A241700
A097155
A197348
*
A158716
A093289
A103545
Adjacent sequences:
A289849
A289850
A289851
*
A289853
A289854
A289855
KEYWORD
nonn
AUTHOR
Robert Price
, Jul 13 2017
STATUS
approved
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Last modified June 6 14:08 EDT 2024. Contains 373128 sequences. (Running on oeis4.)