A289728 Primes of the form k!6-8, where k!6 is the sextuple factorial number (A085158).
19, 47, 83, 397, 1721, 229627, 21827567, 295540237, 13299311017, 678264862267, 3879320022245629336367, 817800727933873464057151867, 85869076433056713726000946867, 9531467484069295223586105103117, 15873007435437477980505511601565617
Offset: 1
Keywords
Links
- Robert Price, Table of n, a(n) for n = 1..26
- Henri & Renaud Lifchitz, PRP Records.Search for n!6-8.
- Joe McLean, Interesting Sources of Probable Primes
- OpenPFGW Project, Primality Tester
Crossrefs
Cf. A289686.
Programs
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Mathematica
MultiFactorial[n_, k_] := If[n<1, 1, n*MultiFactorial[n-k, k]]; Select[Table[MultiFactorial[i, 6] - 8, {i, 8, 100}], PrimeQ[#]&]