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 A096674 #4 Mar 30 2012 17:29:16 %S A096674 6,39,42,78,114,147,186,201,237,222,258,309,327,399,366,474,438,543, %T A096674 582,582,546,546,579,597,777,834,741,798,834,762,798,903,903,942,1086, %U A096674 1014,1137,1119,1101,1281,1374,1209,1302,1374,1266,1338,1299,1302,1554,1533 %N A096674 Semiperimeter of the first primitive d-arithmetic triangle, where d=A072330(n). %Y A096674 Cf. A072330, A072360, A086909, A089019, A089020, A096672, A096673. %K A096674 nonn %O A096674 1,1 %A A096674 _Ray Chandler_, Jul 03 2004