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 A116305 #7 Jul 17 2021 01:43:57 %S A116305 3377,6616,7027,49941473,50058520,97000297,785321170880,799019801017, %T A116305 989301366860,997000002997,4044997109223941,4136014586911892, %U A116305 4248535260473901,4366325506691845,4457342984379796,5542657015620197 %N A116305 Numbers k such that k*(k+8) gives the concatenation of two numbers m and m+2. %e A116305 97000297 * 97000305 = 94090583//94090585, where // denotes concatenation. %Y A116305 Cf. A116174, A116299, A116304, A116306, A116312. %K A116305 nonn,base %O A116305 1,1 %A A116305 _Giovanni Resta_, Feb 06 2006