OFFSET
1,1
COMMENTS
a(n) == 19 mod 24 for all n > 1. - Zak Seidov, Mar 10 2015
LINKS
Vincenzo Librandi, Table of n, a(n) for n = 1..1000
P. De Geest, Palindromic Quasipronics of the form n(n+x)
FORMULA
a(n) = A028879(n)^2 - 6. - Zak Seidov, Mar 10 2015
PROG
(Magma) [ a: n in [1..250] | IsPrime(a) where a is 4*n^2+4*n-5 ]; // Vincenzo Librandi, Aug 05 2010
(PARI) for(n=1, 500, if(isprime(p=n^2-6), print1(p, ", "))) \\ Derek Orr, Mar 11 2014
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
STATUS
approved