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 A014857 #11 Jul 03 2021 16:37:47 %S A014857 1,3,9,21,39,63,117,147,171,273,333,441,507,819,903,1029,1197,1521, %T A014857 1911,2223,2331,2709,3081,3087,3249,3549,4329,5733,6123,6321,6327, %U A014857 6591,6813,7203,8001,8379,9243,10647,11487,11739,12207,12321,13377 %N A014857 Numbers k that divide s(k), where s(1)=1, s(j)=9*s(j-1)+j. %Y A014857 s(n) = A014832(n). %K A014857 nonn %O A014857 1,2 %A A014857 _N. J. A. Sloane_, _Olivier Gérard_