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A288407 Primes of the form k!2+16, where k!2 is the double factorial number (A006852). 1
17, 19, 31, 135151, 34459441, 7905853580641, 213458046676891, 319830986772877770815641, 25373791335626257947657609391, 1192568192774434123539907640641, 157952079428395476360490147277859391 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
LINKS
Henri& Renaud Lifchitz, PRP Records.Search for n!2+16.
OpenPFGW Project, Primality Tester
MATHEMATICA
MultiFactorial[n_, k_] := If[n<1, 1, n*MultiFactorial[n-k, k]];
Select[Table[MultiFactorial[i, 2] + 16, {i, 0, 100}], PrimeQ[#]&]
CROSSREFS
Cf. A076189.
Sequence in context: A085106 A079592 A160027 * A286611 A144213 A318940
KEYWORD
nonn
AUTHOR
Robert Price, Jun 08 2017
STATUS
approved

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Last modified March 19 04:58 EDT 2024. Contains 370952 sequences. (Running on oeis4.)