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 A114138 #6 Nov 18 2013 16:53:29
%S A114138 1,1,2,3,5,9,15,26,44,75,129,220,377,644,1101,1883,3219,5505,9412,
%T A114138 16093,27518,47051,80453,137563,235215,402188,687688,1175860,2010567,
%U A114138 3437810,5878212,10050981,17185883,29385638,50245647,85913568,146901103,251181919
%N A114138 Number of (ordered) sequences of coins (each of which has value 1, 2, 5, 10, 20, 50, 100 or 200) which add to n.
%C A114138 Based on Euro coins as of Feb 22 2006.
%F A114138 G.f.: 1/(1-(x+x^2+x^5+x^10+x^20+x^50+x^100+x^200)).
%t A114138 CoefficientList[Series[1/(1-(x+x^2+x^5+x^10+x^20+x^50+x^100+x^200)),{x,0,50}],x] (* _Harvey P. Dale_, Nov 18 2013 *)
%Y A114138 Cf. A114044, A073031, A114140.
%K A114138 nonn
%O A114138 0,3
%A A114138 _David S. Johnson_ and _N. J. A. Sloane_, Feb 22 2006