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 A076727 #16 Aug 22 2024 02:04:48
%S A076727 17,29,89,149,269,317,617,929,1109,1409,2969,3449,3617,4517,5309,6389,
%T A076727 7817,8069,8849,12329,14969,17117,17489,21017,23117,23549,27617,30509,
%U A076727 32009,33029,34589,35117,41189,42929,43517,47129,48989,52817,60209
%N A076727 Primes of the form x^2 + (x+3)^2.
%C A076727 Each prime of the form 4k+1 has a unique representation as x^2+y^2; these primes have y-x=3.
%H A076727 Vincenzo Librandi, <a href="/A076727/b076727.txt">Table of n, a(n) for n = 1..1000</a>
%t A076727 Select[Table[2*n^2+6*n+9,{n,0,300}],PrimeQ] (* _Vincenzo Librandi_, Jul 15 2012 *)
%o A076727 (Magma) [a: n in [0..200] | IsPrime(a) where a is 2*n^2+6*n+9]; // _Vincenzo Librandi_, Jul 15 2012
%Y A076727 Cf. A002144, A027862.
%K A076727 easy,nonn
%O A076727 1,1
%A A076727 _Cino Hilliard_, Oct 28 2002
%E A076727 Edited by _Don Reble_, May 03 2006