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 A175635 #2 Mar 30 2012 17:26:35 %S A175635 0,11,149,1156,2538,22925,163284,2116076,9321378,31622764 %N A175635 a(n) = smallest number m such that decimal expansion of m^2 has exactly (n+1) digits n. %e A175635 a(0)=0 because 0^2=0 has one 0 %e A175635 a(1)=1 because 11^2=121 has two 1's %e A175635 a(2)=149 because 149^2=22201 has three 2's %e A175635 a(8)=9321378 because 9321378^2=86888087818884 has nine 8's %e A175635 a(9)=31622764 because 31622764^2=999999202999696 has ten 9's. %Y A175635 Cf. A086935, A179895. %K A175635 base,fini,full,nonn %O A175635 0,2 %A A175635 _Zak Seidov_, Aug 01 2010