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 A067473 #4 Dec 05 2013 19:55:09 %S A067473 36,324,3025,30276,300304,3003289,30008484,300017041,3000081529, %T A067473 30000318436,300000484729,3000000666601,30000004655076, %U A067473 300000032019081,3000000027329536,30000000084216561,300000000542063364 %N A067473 Smallest n-digit square starting with 3. %F A067473 a(n) = ceiling(sqrt(3*10^(n-1)))^2, n>1. - _Rick L. Shepherd_, Feb 14 2002 %o A067473 (PARI) for(n=2,25,a=ceil(sqrt(3*10^(n-1)))^2; print(a)) %Y A067473 Cf. A035070 (roots), A045786, A067479 (2..9). %K A067473 base,easy,nonn %O A067473 2,1 %A A067473 _Amarnath Murthy_, Feb 09 2002 %E A067473 More terms from _Rick L. Shepherd_, Feb 14 2002