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 A065767 #8 Oct 15 2013 22:31:11
%S A065767 399,5187,12369,34671,48279,73017,80199,122493,152019,160797,220647,
%T A065767 259749,311619,347529,396207,436107,561393,687477,755307,900543,
%U A065767 949221,1042587,1074801,1142337,1412859,1496649,1509417,1592409,1818243
%N A065767 Intersection of A065764 and A065765: n such that x and y exist with sigma[x^2] = n = sigma[2*(y^2)].
%H A065767 T. D. Noe, <a href="/A065767/b065767.txt">Table of n, a(n) for n=1..10000</a>
%e A065767 n = 399 = sigma[14^2] = sigma[2*(11^2)] = 1+2+4+7+14+28+49+98+196 = 1+2+11+22+121+242; also sigma[42.42] = sigma[2.33.33] = sigma[1764] = sigma[2378] = 5187.
%t A065767 Intersection[Table[DivisorSigma[1, w^2], {w, 1, 10000}], Table[DivisorSigma[1, 2*(w^2)], {w, 1, 10000}]]
%Y A065767 Cf. A028982, A000203, A000290, A065764-A065768.
%K A065767 nonn
%O A065767 1,1
%A A065767 _Labos Elemer_, Nov 19 2001