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 A095865 #3 Mar 30 2012 17:29:16 %S A095865 0,0,5,35,11,128,405,1628,5153,6281,20331,404505,1326005,2437316, %T A095865 12392316,42485480,37150046,18810,179470703,2237948990,10876002500, %U A095865 22548781025,26940078203,242416922750,572687476751,4117080477500 %N A095865 Smallest n-digit triangular number - smallest n-digit number. %F A095865 a(n) = A068093(n) - 10^(n-1). %Y A095865 Cf. A068092, A068093, A068094, A095863, A095864, A095866. %K A095865 base,easy,nonn %O A095865 1,3 %A A095865 _Ray Chandler_, Jun 28 2004