Year-end appeal: Please make a donation to the OEIS Foundation to support ongoing development and maintenance of the OEIS. We are now in our 61st year, we have over 378,000 sequences, and we’ve reached 11,000 citations (which often say “discovered thanks to the OEIS”).
%I #8 May 26 2019 01:54:00
%S 0,2,4,5,7,12,14,15,27,30,32,34,40,47,49,50,57,60,62,67,72,75,82,85,
%T 89,95,97,102,104,105,109,110,119,135,140,162,175,177,180,182,187,189,
%U 194,200,214,219,222,225,235,239,242,244,247,254,257,259,265,277,279,280
%N Numbers m such that 23 + 36*m*(m+1) is prime.
%C All terms of A121250 (numbers n such that n^2+14 is prime) are of the form n = 3+6*m, m = 0, 1, .... Hence n^2 + 14 = 23 + 36*m(m+1): these values of m are in this sequence.
%t Select[Range[0,300], PrimeQ[23 + 36*#(1+# ]&]
%o (PARI) select( is_A121817(n)=isprime(23+36*(n+1)*n), [0..299]) \\ _M. F. Hasler_, May 25 2019
%Y Cf. A121250.
%K nonn
%O 1,2
%A _Zak Seidov_, Sep 09 2006
%E Edited by _M. F. Hasler_, May 25 2019