OFFSET
1,1
COMMENTS
Primes of the form (23*k^2 + 23*k + 2)/2.
Numbers k such that (23*k^2 + 23*k + 2)/2 is prime: 3, 8, 20, 36, 56, 68, 71, 75, 80, 96, 111, 131, 140, 155, 159, 251, 255, 264, 276, ...
LINKS
OEIS Wiki, Centered polygonal numbers
Eric Weisstein's World of Mathematics, Centered Polygonal Number
MATHEMATICA
Intersection[Table[(23 k^2 + 23 k + 2)/2, {k, 0, 1000}], Prime[Range[230000]]]
Select[Table[(23k^2+23k+2)/2, {k, 600}], PrimeQ] (* Harvey P. Dale, Jun 17 2021 *)
PROG
(PARI) lista(nn) = for(n=1, nn, if(isprime(p=(23*n^2 + 23*n + 2)/2), print1(p, ", "))); \\ Altug Alkan, Aug 26 2016
CROSSREFS
KEYWORD
nonn
AUTHOR
Ilya Gutkovskiy, Aug 26 2016
STATUS
approved