A289731 Primes of the form k!6-16, where k!6 is the sextuple factorial number (A085158).
11, 389, 919, 8549258359016359, 17694587964658118355578965371540271859, 2388769375228845978003160325157936703109, 8683819409894057159419555626890338258005375505954181180185677734359, 17716286327840198014156487199443278977889267100996146923525170288701171859
Offset: 1
Keywords
Links
- Robert Price, Table of n, a(n) for n = 1..11
- Henri & Renaud Lifchitz, PRP Records.Search for n!6-16.
- Joe McLean, Interesting Sources of Probable Primes
- OpenPFGW Project, Primality Tester
Crossrefs
Cf. A289689.
Programs
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Mathematica
MultiFactorial[n_, k_] := If[n<1, 1, n*MultiFactorial[n-k, k]]; Select[Table[MultiFactorial[i, 6] - 16, {i, 8, 100}], PrimeQ[#]&] Select[Table[Times@@Range[n,1,-6]-16,{n,9,500}],PrimeQ] (* Harvey P. Dale, Apr 07 2025 *)