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 A116115 #6 Jul 21 2021 22:47:17 %S A116115 58,1552909498221642960203840517299022287877411846, %T A116115 1723404686015903064905313664707396376746205762, %U A116115 2153694542826970975147295558223788704098018912 %N A116115 Numbers k such that k concatenated with k-6 gives the product of two numbers which differ by 1. %e A116115 58//52 = 76 * 77, where // denotes concatenation. %Y A116115 Cf. A116101, A116116, A116120, A116246. %K A116115 nonn,base %O A116115 1,1 %A A116115 _Giovanni Resta_, Feb 06 2006