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 A232547 #8 Jun 10 2016 05:08:19 %S A232547 7581,988893,1658073,468539757,35124206517 %N A232547 Numbers n such that sigma(n^2) mod sigma(n) = n. %C A232547 a(6) > 10^12. - _Giovanni Resta_, Jun 10 2016 %Y A232547 Cf. A000203 (sigma(n) = sum of divisors of n), A065764, A232703, A247222. %K A232547 nonn,more %O A232547 1,1 %A A232547 _Alex Ratushnyak_, Nov 25 2013 %E A232547 a(5) from _Giovanni Resta_, Jun 10 2016