A288881 Primes of the form k!3 + 3^5, where k!3 is the triple factorial number (A007661).
271, 523, 1123, 24344563, 96342643, 608608243, 5577337931669504243, 52580450364682240243, 262134882788466688243, 13106744139423334400243, 694657439389436723200243, 7368624314106569113600243, 12931890526958090978845347074978621685760000243
Offset: 1
Keywords
Links
- Robert Price, Table of n, a(n) for n = 1..15
- Henri and Renaud Lifchitz, PRP Records.Search for n!3+3^5.
- Joe McLean, Interesting Sources of Probable Primes.
- OpenPFGW Project, Primality Tester.
Programs
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Mathematica
MultiFactorial[n_, k_] := If[n<1, 1, n*MultiFactorial[n-k, k]]; Select[Table[MultiFactorial[i, 3] + 3^5, {i, 0, 100}], PrimeQ[#]&]