Search: a288445 -id:a288445
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A288614
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Primes of the form k!6+18, where k!6 is the sextuple factorial number (A085158).
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+10
1
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19, 23, 73, 109, 953, 1747, 21523, 1339993, 49579093, 894930593, 104463111043, 3879320022245629336393, 131181879631714694053764558690643, 5685668465320307573857236025777988251766371484393, 164577616892349380880997566903814398769391101461559752758998046893
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OFFSET
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1,1
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LINKS
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MATHEMATICA
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MultiFactorial[n_, k_] := If[n<1, 1, n*MultiFactorial[n-k, k]];
Select[Table[MultiFactorial[i, 6] + 18, {i, 0, 100}], PrimeQ[#]&]
Select[Table[(Times@@Range[k, 1, -6])+18, {k, 250}], PrimeQ] (* Harvey P. Dale, Dec 14 2021 *)
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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STATUS
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approved
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