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 A080897 #2 Apr 09 2005 03:00:00 %S A080897 0,1,2,3,4,10,11,12,13,14,100,101,102,103,104,110,111,112,113,114,200, %T A080897 201,202,203,204,1000,1001,1002,1003,1004,1010,1011,1012,1013,1014, %U A080897 1100,1101,1102,1103,1104,1110,1111,1112,1113,1114,1200,1201,1202,1203,1204 %N A080897 Nonnegative integers written in "base American money" - the places, from the right, are pennies, nickels, dimes, quarters, 50-cent pieces, dollars, 2 dollars, 5 dollars, 10 dollars, 20 dollars, 50 dollars, 100 dollars, ... %e A080897 a(21) = 201 because two dimes and a penny is the smallest number of coins needed to make 21 cents. %K A080897 easy,nonn %O A080897 0,3 %A A080897 Gabriel Cunningham (gcasey(AT)mit.edu), Mar 31 2003