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 A065612 #15 Jun 15 2018 08:11:35
%S A065612 1,189,3,8,12276,39,41454,62,43,30,47,689,23,342,20,647955,786384,60,
%T A065612 433,1316871,104,41,2358,45,31,38,31,28,203,4682601,5183910,736,53,
%U A065612 38012,36,8231895,41,9725265,123,11389131,205,50,302,102,61,46,49,108
%N A065612 Square roots of terms in A065611.
%C A065612 Square root of n^2 + [a special shortest square-sum] which is also square.
%H A065612 Harry J. Smith, <a href="/A065612/b065612.txt">Table of n, a(n) for n = 0..500</a>
%F A065612 a(n) = sqrt(A065611(n)) = sqrt(n^2 + A000330(A065610(n))).
%e A065612 n = 10: a(10) = sqrt(100 + A000330(A065610(10))) = sqrt(100 + (1 + 4 + ... + 18^2)) = sqrt(100 + (18*19*37/6)) = sqrt(100 + 2109) = 47.
%o A065612 (PARI) { for (n = 0, 500, s=n^2 + 1; k=1; while (!issquare(s), k++; s+=k^2); write("b065612.txt", n, " ", sqrtint(s)) ) } \\ _Harry J. Smith_, Oct 24 2009
%Y A065612 Cf. A000330, A065610, A065611.
%K A065612 nonn
%O A065612 0,2
%A A065612 _Labos Elemer_, Nov 07 2001