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 A035074 #11 Oct 08 2019 16:29:01 %S A035074 27,84,265,837,2646,8367,26458,83667,264576,836661,2645752,8366601, %T A035074 26457514,83666003,264575132,836660027,2645751312,8366600266, %U A035074 26457513111,83666002654,264575131107,836660026535,2645751311065 %N A035074 a(n) is root of square starting with digit 7: first term of runs. %F A035074 a(n) = ceiling(sqrt(7*10^n)), n > 1. %t A035074 Ceiling[Sqrt[7*10^Range[2,30]]] (* _Harvey P. Dale_, Jan 21 2015 *) %Y A035074 Cf. A067477 (squares), A035076 (2..9). %K A035074 nonn,base %O A035074 2,1 %A A035074 _Patrick De Geest_, Nov 15 1998