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 A116499 #14 Oct 14 2024 23:59:58 %S A116499 63565788,777035126,785900449264170834,824735400720481514, %T A116499 41969556121016094021,7841042904081599033746826, %U A116499 775474811976872476373043200886,403578381989727694739321538082071713672671,820657465670154825723396137907157085701046 %N A116499 Numbers k such that the base-10 representation of k^2 has the structure dmmd, where d is a single digit and m is a string of digits. %H A116499 Max Alekseyev, <a href="/A116499/b116499.txt">Table of n, a(n) for n = 1..100</a> %e A116499 785900449264170834^2 = 6[17639516153625555][17639516153625555]6. %Y A116499 Cf. A116500, A116501, A305719. %K A116499 base,nonn %O A116499 1,1 %A A116499 _Giovanni Resta_, Feb 18 2006