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A288883
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Primes of the form k!3 + 3^7, where k!3 is the triple factorial number (A007661).
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1
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2267, 2467, 3067, 5827, 60427, 1108747, 4190987, 24346507, 664565853954187, 3091650738178187, 262134882788466690187, 571241722682644258978777268224002187, 1189733928480144370053771930898033195089920002187, 17994728558292550488813850298696914425610240002187
(list;
graph;
refs;
listen;
history;
text;
internal format)
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OFFSET
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1,1
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LINKS
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Robert Price, Table of n, a(n) for n = 1..18
Henri& Renaud Lifchitz, PRP Records.Search for n!3+3^7.
Joe McLean, Interesting Sources of Probable Primes
OpenPFGW Project, Primality Tester
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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, 3] + 3^7, {i, 0, 100}], PrimeQ[#]&]
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CROSSREFS
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Cf. A265200.
Sequence in context: A263972 A263963 A272376 * A206212 A154673 A130179
Adjacent sequences: A288880 A288881 A288882 * A288884 A288885 A288886
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KEYWORD
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nonn
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AUTHOR
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Robert Price, Jun 18 2017
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STATUS
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approved
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