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 A116501 #10 Oct 14 2024 18:04:14 %S A116501 264,238165,309097,1052631579,1104579631,2076555028,2105263158, %T A116501 2209159262,3004048583,3157894737,30762132977,107438016531, %U A116501 214876033062,10909090909091,21818181818182,1001889106154509,1047612381019049,1109550442957111,1113036341252109,1123107893966631,1136632365773631,1168831168831171 %N A116501 Numbers k such that the base-10 representation of k^2 has the structure dmdmd, where d is a single digit and m is a string of digits. %H A116501 Max Alekseyev, <a href="/A116501/b116501.txt">Table of n, a(n) for n = 1..10000</a> %e A116501 309097^2 = 9[5540]9[5540]9. %Y A116501 Cf. A116499, A116502. %K A116501 base,nonn %O A116501 1,1 %A A116501 _Giovanni Resta_, Feb 18 2006 %E A116501 Terms a(17) onward from _Max Alekseyev_, Oct 14 2024