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A288883 Primes of the form k!3 + 3^7, where k!3 is the triple factorial number (A007661). 1
2267, 2467, 3067, 5827, 60427, 1108747, 4190987, 24346507, 664565853954187, 3091650738178187, 262134882788466690187, 571241722682644258978777268224002187, 1189733928480144370053771930898033195089920002187, 17994728558292550488813850298696914425610240002187 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

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

MATHEMATICA

MultiFactorial[n_, k_] := If[n<1, 1, n*MultiFactorial[n-k, k]];

Select[Table[MultiFactorial[i, 3] + 3^7, {i, 0, 100}], PrimeQ[#]&]

CROSSREFS

Cf. A265200.

Sequence in context: A263972 A263963 A272376 * A206212 A154673 A130179

Adjacent sequences:  A288880 A288881 A288882 * A288884 A288885 A288886

KEYWORD

nonn

AUTHOR

Robert Price, Jun 18 2017

STATUS

approved

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Last modified May 18 21:30 EDT 2022. Contains 353825 sequences. (Running on oeis4.)