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A288882 Primes of the form k!3 + 3^6, where k!3 is the triple factorial number (A007661). 1
733, 739, 757, 809, 1009, 1609, 13049, 210169, 81359229952729, 126757680265216729, 13106744139423334400729, 2295148179742698933452800729, 12931890526958090978845347074978621685760000729 (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+3^6.

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] + 3^6, {i, 0, 100}], PrimeQ[#]&]

CROSSREFS

Cf. A247867.

Sequence in context: A098291 A255798 A044988 * A178093 A143726 A180919

Adjacent sequences:  A288879 A288880 A288881 * A288883 A288884 A288885

KEYWORD

nonn

AUTHOR

Robert Price, Jun 18 2017

STATUS

approved

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Last modified June 16 04:54 EDT 2019. Contains 324145 sequences. (Running on oeis4.)