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 A116052 #5 Jan 22 2022 19:14:21 %S A116052 2,3,57,63,64,83,85,91,98,133,141,145,149,154,156,187,189,232,247,249, %T A116052 255,263,279,281,293,310,319,415,419,425,467,512,575,589,593,653,791, %U A116052 799,813,837,839,970,1019,1103,1113,1145,1247,1259,1427,2183,2223 %N A116052 Numbers k such that k + sigma(k) + sigma(sigma(k)) is a brilliant number (A078972). %e A116052 1103 is in the sequence since 1103 + sigma(1103) + sigma(sigma(1103)) = 71*73 (a brilliant number). %Y A116052 Cf. A078972 (brilliant numbers), A116051. %K A116052 nonn,base %O A116052 1,1 %A A116052 _Giovanni Resta_, Feb 13 2006