A288892 Primes of the form k!12+2, where k!12 is the 12-way factorial number.

3, 5, 7, 11, 13, 47, 191, 1217, 2467, 47387, 98348405029877, 4236855368093671921723127, 67181587479226956985234896806020127, 892032079930114592828175067173074768240627, 1350562067805887256448098266867371770081404755312330218315703127

Offset

1,1

Links

Robert Price, Table of n, a(n) for n = 1..20

Henri& Renaud Lifchitz, PRP Records.Search for n!12+2.

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, 12] + 2, {i, 0, 100}], PrimeQ[#]&]

Crossrefs

Cf. A283594.

Sequence in context: A175914 A288370 A108817 * A373349 A123677 A133954

Adjacent sequences: A288889 A288890 A288891 * A288893 A288894 A288895

Keyword

nonn

Author

Robert Price, Jun 18 2017

Status

approved