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 A090685 #20 Sep 08 2022 08:45:12
%S A090685 73,1153,1801,2593,3529,8713,10369,18433,20809,34849,48673,52489,
%T A090685 69193,83233,103969,115201,139393,180001,187273,209953,259201,267913,
%U A090685 362953,405001,415873,426889,438049,449353,472393,484129,508033,622729,636193
%N A090685 Primes of the form 8*k^2 + 1.
%H A090685 Daniel Starodubtsev, <a href="/A090685/b090685.txt">Table of n, a(n) for n = 1..10000</a>
%t A090685 Select[8 Range[300]^2+1,PrimeQ] (* _Harvey P. Dale_, Apr 02 2011 *)
%o A090685 (PARI) A090685(n) = { for(x=1,n, y = 8*x^2+1; if(isprime(y),print1(y",")) ) }
%o A090685 (Magma) [ a: n in [0..350] | IsPrime(a) where a is 8*n^2+1 ]; // _Vincenzo Librandi_, Apr 04 2011
%Y A090685 Cf. A188549.
%K A090685 easy,nonn
%O A090685 1,1
%A A090685 _Cino Hilliard_, Dec 18 2003