OFFSET
1,2
LINKS
Zak Seidov, Table of n, a(n) for n = 1..1000.
FORMULA
a(n) = A132398(n)/6.
PROG
(PARI) isok(n) = isprime(396*n^2 + 1); \\ Michel Marcus, Oct 13 2013
CROSSREFS
KEYWORD
nonn
AUTHOR
Zak Seidov, Nov 15 2007
STATUS
approved