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 A007883 #8 Sep 21 2013 12:47:33 %S A007883 4,8,12,17,4,8,12,18,4,8,12,19,4,8,12,20,4,8,12,21,4,8,12,22,4,8,12, %T A007883 23,4,8,12,24,4,8,12,25,4,8,12,26,4,8,12,27,4,8,12,28,4,8,12,17,4,8, %U A007883 12,18,4,8,12,19,4,8,12,20,4,8,12,21,4,8,12,22,4,8,12,23,4,8,12,24,4,8,12,25 %N A007883 Westminster chimes at 15-minute intervals (2). %e A007883 First quarter hour: x x x x %e A007883 second quarter hour: x x x x, x x x x %e A007883 third quarter hour: x x x x, x x x x, x x x x %e A007883 one o'clock: x x x x, x x x x, x x x x, x x x x, X %e A007883 first quarter hour: x x x x %e A007883 second quarter hour: x x x x, x x x x %e A007883 third quarter hour: x x x x, x x x x, x x x x %e A007883 two o'clock: x x x x, x x x x, x x x x, x x x x, X X %e A007883 ... %K A007883 nonn %O A007883 1,1 %A A007883 _Colin Mallows_