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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, 669325572332691496707919692320662308340434243618803739488329723923351785805848442856791239207612629457179653299076271283992814866750698368061459208762618124485015869140609 (list; graph; refs; listen; history; text; internal format)
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 April 14 00:42 EDT 2021. Contains 342941 sequences. (Running on oeis4.)