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 A061110 #7 Jan 20 2017 19:56:12 %S A061110 1,6,9,744,41796,60172924176,8240010144800000000001, %T A061110 82400101448000000000020000000000000000000001 %N A061110 a(1) = 1; a(n) = smallest number such that the concatenation a(1)a(2)...a(n) is a square. %C A061110 The next term is too large to include. %C A061110 a(n) is at most doubly exponential in n. Is there also a double exponential lower bound? - _Charles R Greathouse IV_, Sep 19 2012 %H A061110 A. Murthy, <a href="http://www.gallup.unm.edu/~smarandache/SN/ScArt5/ExploringNewIdeas.pdf">Exploring some new ideas on Smarandache type sets, functions and sequences</a>, Smarandache Notions Journal Vol. 11 N. 1-2-3 Spring 2000. %e A061110 a(1) = 1, a(1)a(2) = 16 = 4^2, a(1)a(2)a(3) = 169 = 13^2, 169744 = 412^2. %Y A061110 Cf. A061109, A051671. The actual squares are in A048557. %K A061110 base,nonn %O A061110 1,2 %A A061110 _Amarnath Murthy_, Apr 20 2001 %E A061110 More terms from Larry Reeves (larryr(AT)acm.org), Jul 23 2001