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 A094210 #21 Sep 26 2022 06:18:17 %S A094210 1,2,3,4,5,7,8,9,10,12,14,15,18,19,20,23,25,27,29,30,34,37,38,40,43, %T A094210 44,45,47,49,52,53,54,55,58,59,63,64,65,67,69,75,82,84,85,88,92,93,95, %U A094210 99,100,102,113,114,119,124,125,129,130,133,137,139,140,143,144,147,148 %N A094210 Numbers k such that k^2 + 3k + 1 is a prime. %H A094210 Zak Seidov, <a href="/A094210/b094210.txt">Table of n, a(n) for n = 1..10000</a> %F A094210 a(n) = A002328(n)-2. - _R. J. Mathar_, Aug 08 2012 %t A094210 Select[ Range[150], PrimeQ[ #^2 + 3# + 1] &] (* _Robert G. Wilson v_, May 29 2004 *) %o A094210 (Magma) [n: n in [0..200] | IsPrime(n^2 + 3*n + 1)]; // _Vincenzo Librandi_, Nov 11 2014 %Y A094210 Cf. A002327, A002328, A028387. %K A094210 easy,nonn %O A094210 1,2 %A A094210 _Giovanni Teofilatto_, May 27 2004 %E A094210 Edited and extended by _Robert G. Wilson v_, May 29 2004