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 A116101 #6 Jul 21 2021 22:46:05 %S A116101 40,54999166056446260156057520,57975463942945155043148110, %T A116101 71745828111009107426351428,75139610610667830220414750, %U A116101 1640418113875534941913761115401064 %N A116101 Numbers k such that k concatenated with k-8 gives the product of two numbers which differ by 1. %e A116101 40//32 = 63 * 64, where // denotes concatenation. %Y A116101 Cf. A116094, A116102, A116115, A116232. %K A116101 nonn,base %O A116101 1,1 %A A116101 _Giovanni Resta_, Feb 06 2006