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A288881 Primes of the form k!3 + 3^5, where k!3 is the triple factorial number (A007661). 1
271, 523, 1123, 24344563, 96342643, 608608243, 5577337931669504243, 52580450364682240243, 262134882788466688243, 13106744139423334400243, 694657439389436723200243, 7368624314106569113600243, 12931890526958090978845347074978621685760000243 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Robert Price, Table of n, a(n) for n = 1..15

Henri& Renaud Lifchitz, PRP Records.Search for n!3+3^5.

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] + 3^5, {i, 0, 100}], PrimeQ[#]&]

CROSSREFS

Cf. A247868.

Sequence in context: A090838 A086708 A142637 * A245969 A157485 A038655

Adjacent sequences:  A288878 A288879 A288880 * A288882 A288883 A288884

KEYWORD

nonn

AUTHOR

Robert Price, Jun 18 2017

STATUS

approved

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Last modified June 19 11:17 EDT 2021. Contains 345127 sequences. (Running on oeis4.)