OFFSET
1,2
COMMENTS
a(72) > 3830, and the sequence then continues: 6, 2, 7, 1, 27, 2, 3, 1, 7, 2, 1, 1, 4, 36, 346, 1, 1, 1, 1, 3, 6, 2, 1, 2, 444, ...
a(72) > 10^4. - Ray Chandler, Nov 13 2004
FORMULA
a(A138918(n)) = 1. - Michel Marcus, Jul 28 2015
MATHEMATICA
f[n_] := Block[{k = 1}, While[ !PrimeQ[3*((6*n)^k) - 1], k++ ]; k]; Table[ f[n], {n, 71}] (* Robert G. Wilson v, Oct 21 2004 *)
CROSSREFS
KEYWORD
nonn
AUTHOR
Pierre CAMI, Oct 13 2004
EXTENSIONS
Corrected and extended by Robert G. Wilson v, Oct 22 2004
STATUS
approved