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 A169679 #3 Mar 30 2012 19:01:05 %S A169679 0,1,3,7,12,18,26,35,45,59,72,88,105,125,149,178,199,233,255,285,316, %T A169679 344,352,392,401,442,502,557,596,675,733,796,797,865,891,957,1011, %U A169679 1086,1119,1220,1311,1330,1411,1564,1579,1646,1773,1888,2011,2120,2152,2324,2371 %N A169679 A169677 union A169678. %K A169679 nonn %O A169679 1,3 %A A169679 _R. K. Guy_ and _N. J. A. Sloane_, Mar 27 2010