This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A122430 #27 Sep 08 2022 08:45:28
%S A122430 17,457,617,1009,1777,2081,3137,4409,5897,9521,11657,14009,24481,
%T A122430 25577,29009,39217,43441,47881,49409,62497,67801,75209,81017,85009,
%U A122430 87041,93281,97561,104161,110977,120401,132721,135257,140401,159161,182041
%N A122430 Primes of the form 1+2*n+3*n^2.
%C A122430 3*a(n)-2 is a square (of the form (3*k+1)^2). - _Vincenzo Librandi_, Mar 15 2013
%C A122430 Also primes which are the sum of 2 consecutive pentagonal numbers (A000326). - _Vicente Izquierdo Gomez_, Aug 13 2017
%H A122430 Vincenzo Librandi, <a href="/A122430/b122430.txt">Table of n, a(n) for n = 1..1000</a>
%t A122430 Select[Table[1 + 2 n + 3 n^2, {n, 500}], PrimeQ] (* _Vincenzo Librandi_, Mar 15 2013 *)
%o A122430 (Magma) [a: n in [1..300] | IsPrime(a) where a is 1+2*n+3*n^2]; // _Vincenzo Librandi_, Mar 15 2013
%o A122430 (PARI) is(n)=isprime(n) && issquare(3*n-2,&n) && n%3==1 \\ _Charles R Greathouse IV_, Sep 23 2013
%Y A122430 Cf. A086285 (numbers n such that 1+2n+3n^2 is prime).
%Y A122430 Subsequence of A056109.
%K A122430 nonn
%O A122430 1,1
%A A122430 _Zak Seidov_, Oct 20 2006