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 A175673 #7 Sep 24 2013 16:17:53 %S A175673 0,9,36,84,126,126,84,36,9,1 %N A175673 Number of n-digit terms in A179955. %e A175673 a(1)=0 because least term in A179955 is 19 %e A175673 a(2)=9 because there are nine 2-digit terms A179955: 19,28,37,46,55,64,73,82,91. %Y A175673 Cf. A179955. %K A175673 fini,full,nonn,base %O A175673 1,2 %A A175673 _Zak Seidov_, Aug 06 2010 %E A175673 One term corrected (7 changed to 9) by _Zak Seidov_, Aug 07 2010