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 A116106 #7 Jul 21 2021 22:46:39 %S A116106 9,13,99,103,183,328,528,715,999,1003,6099,9999,10003,13224,40495, %T A116106 99999,100003,106755,453288,999999,1000003,2066115,2975208,9999999, %U A116106 10000003,22145328,28027683,99999999,100000003,110213248,110667555 %N A116106 Numbers k such that k concatenated with k-8 gives the product of two numbers which differ by 6. %e A116106 999999999//999999991 = 999999997 * 1000000003, where // denotes concatenation. %Y A116106 Cf. A116098, A116105, A116107, A115426, A116237. %K A116106 nonn,base %O A116106 1,1 %A A116106 _Giovanni Resta_, Feb 06 2006