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 A116099 #8 Jul 21 2021 22:45:57 %S A116099 69,59898667,79493157,13412927190959690154913903, %T A116099 14163000698458955079906403,38895475965785687555173929, %U A116099 40165600438484442828161229,74294440818366638194239027 %N A116099 Numbers k such that k concatenated with k-9 gives the product of two numbers which differ by 7. %C A116099 Also numbers k such that k concatenated with k-3 gives the product of two numbers which differ by 5. %C A116099 Also numbers k such that k concatenated with k+1 gives the product of two numbers which differ by 3. %C A116099 Also numbers k such that k concatenated with k+3 gives the product of two numbers which differ by 1. %e A116099 79493157//79493154 = 89158933 * 89158938, where // denotes concatenation. %e A116099 79493157//79493158 = 89158934 * 89158937. %e A116099 79493157//79493160 = 89158935 * 89158936. %e A116099 79493157//79493148 = 89158932 * 89158939. %Y A116099 Cf. A116098, A116193, A116107, A116230, A116130, A116136, A116205, A116107, A116268. %Y A116099 Cf. A115426, A115428, A116171, A116296, A116170, A116177, A116307. %K A116099 nonn,base %O A116099 1,1 %A A116099 _Giovanni Resta_, Feb 06 2006 %E A116099 Edited by _N. J. A. Sloane_, Apr 12 2007