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A289732
Primes of the form k!6-18, where k!6 is the sextuple factorial number (A085158).
1
37, 73, 21487, 43207, 21827557, 11510631741140058401857, 345259481979861010937357, 1047467488443745314570607, 10465247677041459437875114357, 2015871944300559703524199973398834357, 5685668465320307573857236025777988251766371484357
OFFSET
1,1
LINKS
MATHEMATICA
MultiFactorial[n_, k_] := If[n<1, 1, n*MultiFactorial[n-k, k]];
Select[Table[MultiFactorial[i, 6] - 18, {i, 9, 100}], PrimeQ[#]&]
Select[Table[Times@@Range[n, 1, -6]-18, {n, 10, 300}], PrimeQ] (* Harvey P. Dale, Jul 07 2019 *)
CROSSREFS
Cf. A289696.
Sequence in context: A217386 A083990 A123815 * A087531 A283718 A085959
KEYWORD
nonn
AUTHOR
Robert Price, Jul 10 2017
STATUS
approved