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 A115916 #5 Jul 15 2021 21:25:23 %S A115916 2,3,4,5,6,7,128,144,400,576,1296,8100,11664,13225,15129,34969,40000, %T A115916 44944,55112,60025,63368,67712,69938,91809,103058,135424,157922, %U A115916 203401,861184,1034289,1258884,1270418,1435204,1440000,1575025 %N A115916 Numbers k such that sigma(k) + phi(k) is a brilliant number (A078972). %e A115916 sigma(55112) + phi(55112) = 131819 = 193*683. %Y A115916 Cf. A078972, A115914, A115915. %K A115916 nonn,base %O A115916 1,1 %A A115916 _Giovanni Resta_, Feb 06 2006