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 A118629 #4 Mar 30 2012 17:28:19 %S A118629 10,36,84,126,126,84,36,9,1 %N A118629 Number of n-digit integers with decimal digits in increasing order. %C A118629 There are precisely 512 such numbers, see A009993. %F A118629 a(1)=1, at n>1: a(n)=binomial(10, n)(1 - n/10) %e A118629 a(2)=36 because there are 36 two-digit integers whose decimal digits are in increasing order (see A009993): 12, 13, 14, 15, 16, 17, 18, 19, 23, 24, 25, 26, 27, 28, 29, 34, 35, 36, 37, 38, 39, 45, 46, 47, 48, 49, 56, 57, 58, 59, 67, 68, 69, 78, 79, 89 %Y A118629 Cf. A009993. %K A118629 fini,full,nonn,base %O A118629 1,1 %A A118629 _Zak Seidov_, May 09 2006 %E A118629 Edited by _Charles R Greathouse IV_, Aug 05 2010