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 A202208 #11 Oct 30 2018 10:31:02
%S A202208 9,9,25,49,81,25,169,225,289,81,441,49,625,169,121,961,1089,289,1369,
%T A202208 81,169,441,2025,289,2401,625,2809,225,3249,121,3721,3969,529,1089,
%U A202208 841,289,5329,1369,625,961,6561,169,7225,529,361,2025,8649,961,9409,2401
%N A202208 Smallest square (>4n) == 1 mod 4n.
%C A202208 This is to squares as A070848 to primes.
%o A202208 (PARI) {nn=100;for(n=1,nn,s=1+4*n;while(!issquare(s),s=s+4*n); print1(s,", "))}
%Y A202208 Cf. A070848.
%K A202208 nonn
%O A202208 1,1
%A A202208 _Zak Seidov_, Dec 14 2011