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 A116335 #6 Jul 16 2021 21:31:38 %S A116335 7746,8020,33294317,66705682,98000200,340465755424,476452552744, %T A116335 523547447255,659534244575,866013200680,998000002000,3695104677080133, %U A116335 3755782995538767,4198081170077530,4803478892324965,5196521107675034 %N A116335 Numbers k such that k*(k+2) gives the concatenation of two numbers m and m+7. %e A116335 98000200 * 98000202 = 96040393//96040400, where // denotes concatenation. %Y A116335 Cf. A115429, A116315, A116336, A116344. %K A116335 nonn,base %O A116335 1,1 %A A116335 _Giovanni Resta_, Feb 06 2006