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 A139705 #1 Jun 29 2008 03:00:00
%S A139705 0,81,153,2268,3150,38718
%N A139705 Number of entries in A139704 ("nearly palindromic numbers") with n digits.
%Y A139705 Cf. A139704, A050683.
%K A139705 nonn,base
%O A139705 1,2
%A A139705 Jono Henshaw (jjono(AT)hotmail.com), Apr 30 2008