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 A050763 #10 Oct 17 2019 14:26:16 %S A050763 0,1,2,3,4,5,7,9,15,18 %N A050763 Numbers k such that the decimal expansion of k^k contains no pair of consecutive equal digits (probably finite). %Y A050763 Cf. A043096, A000312, A050764, A049329. %K A050763 nonn,base,more %O A050763 1,3 %A A050763 _Patrick De Geest_, Sep 15 1999 %E A050763 Changed offset to 1. - _N. J. A. Sloane_, Aug 24 2019