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 A061839 #17 Mar 05 2015 12:25:16 %S A061839 5,25,225,1225,81225,16281225,7077116281225,1642681227077116281225, %T A061839 228822983661635570881642681227077116281225, %U A061839 976324672198183536165095004791768497036228822983661635570881642681227077116281225 %N A061839 a(n+1) is the smallest square ending with a(n), initial term is 5. %H A061839 <a href="/index/Fi#final">Index entries for sequences related to final digits of numbers</a> %Y A061839 Cf. A050634, A065689, A065780, A065781, A050636, A050638. %K A061839 base,nonn %O A061839 1,1 %A A061839 _Amarnath Murthy_, May 29 2001 %E A061839 Corrected and extended by _Frank Ellermann_, Jun 04 2001 %E A061839 More terms from Ulrich Schimke (ulrschimke(AT)aol.com), Dec 18 2001 %E A061839 Edited by _N. J. A. Sloane_, Apr 29 2007 %E A061839 First term prepended by _Derek Orr_, Dec 27 2013