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 A116125 #8 Jul 20 2021 23:42:53 %S A116125 7,97,205,300,477,732,997,1920,3157,9997,52896,99997,120085,427020, %T A116125 999997,8264460,9999997,88581312,99999997,112000885,112917765, %U A116125 143075580,152863360,193537077,233788192,266755221,313680096 %N A116125 Numbers k such that k concatenated with k-5 gives the product of two numbers which differ by 6. %C A116125 Also numbers k such that k concatenated with itself gives the product of two numbers which differ by 4. %e A116125 6786111717//6786111712 = 8237785936 * 8237785942, where // denotes concatenation. %Y A116125 Cf. A115426, A116124, A116126, A116131, A116256. %Y A116125 Cf. A116130, A116158, A115428, A116288. %K A116125 nonn,base %O A116125 1,1 %A A116125 _Giovanni Resta_, Feb 06 2006 %E A116125 Edited by _N. J. A. Sloane_, Apr 15 2007