A288889 Primes of the form k!3+3, where k!3 is the triple factorial number (A007661).
5, 7, 13, 31, 83, 283, 883, 3643, 12323, 58243, 1106563, 4188803, 2504902403, 17041024003, 72642169603, 2324549427203, 126757680265216003, 38900816605808456499200003, 26070192823309041523916800003, 254451773522587035734629406212096000003
Offset: 1
Keywords
Links
- Robert Price, Table of n, a(n) for n = 1..24
- Henri& Renaud Lifchitz, PRP Records.Search for n!3+3.
- 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, {i, 0, 100}], PrimeQ[#]&]