A289859 Primes of the form k!2-2, where k!2 is the sextuple factorial number (A085158).
13, 103, 2027023, 34459423, 654729073, 2980227913743310874726229193921873, 174865344543353986303948473285124243127671456831640623, 352999527454840466971061863960307904899505075341088595453568994140623
Offset: 1
Keywords
Links
- Robert Price, Table of n, a(n) for n = 1..10
- Henri & Renaud Lifchitz, PRP Records.Search for n!2-2.
- 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, 2] - 2, {i, 3, 100}], PrimeQ[#]&]