OFFSET
1,1
COMMENTS
All terms are odd and not divisible by 3.
LINKS
Harvey P. Dale, Table of n, a(n) for n = 1..1000
FORMULA
If A056927(k) = 12, then k is a term. - A.H.M. Smeets, Aug 15 2019
EXAMPLE
11 is in the sequence because 11^2 - 12 = 109, which is prime.
MATHEMATICA
Select[Range[5, 301, 2], PrimeQ[#^2-12]&] (* Harvey P. Dale, Dec 23 2019 *)
PROG
(PARI) select(n->isprime(n^2-12), [1..1000]) \\ Andrew Howroyd, Aug 14 2019
CROSSREFS
KEYWORD
nonn
AUTHOR
Daniel Starodubtsev, Aug 14 2019
STATUS
approved