A288882 Primes of the form k!3 + 3^6, where k!3 is the triple factorial number (A007661).

733, 739, 757, 809, 1009, 1609, 13049, 210169, 81359229952729, 126757680265216729, 13106744139423334400729, 2295148179742698933452800729, 12931890526958090978845347074978621685760000729

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. A007661, 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