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 A116195 #7 Jul 19 2021 22:58:57 %S A116195 7403,8885,12563,41675,54239,2353623,2650793,7717533,527390351115, %T A116195 567933643889,627121279653,671264212463,1335723019653517755, %U A116195 2049430589972661489,2995303155542192885,4026214090447622723 %N A116195 Numbers k such that k concatenated with k+5 gives the product of two numbers which differ by 7. %e A116195 7717533//7717538 = 8784946 * 8784953, where // denotes concatenation. %Y A116195 Cf. A116133, A116194, A116196, A116147, A116326. %K A116195 nonn,base %O A116195 1,1 %A A116195 _Giovanni Resta_, Feb 06 2006