OFFSET
1,1
COMMENTS
All terms end in 2, 3 or 7.
LINKS
Robert Israel, Table of n, a(n) for n = 1..10000
EXAMPLE
a(3)=7 is a member because 7 is prime and (7^2+6)/5 = 11 is prime.
MAPLE
select(p -> isprime(p) and isprime((p^2+6)/5), [2, seq(seq(10*i+j, j=[3, 7]), i=0..1000)]);
CROSSREFS
KEYWORD
nonn
AUTHOR
J. M. Bergot and Robert Israel, Oct 14 2020
STATUS
approved