OFFSET
1,2
COMMENTS
First terms that are not in A125874: 19, 31, 39, 43, 46, 51, 58, 73, 85, 91 (terms with prime factor > 11).
LINKS
Zak Seidov, Table of n, a(n) for n = 1..1000
FORMULA
a(n) = (A141849(n) - 1)/22.
PROG
(PARI) isok(n) = isprime(22*n+1); \\ Michel Marcus, Oct 19 2013
CROSSREFS
KEYWORD
nonn
AUTHOR
Zak Seidov, Aug 20 2012
STATUS
approved