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 A027165 #4 Mar 30 2012 18:56:14 %S A027165 1,2,6,10,39,61,180,300,1157,1823,5502,9282,35911,57101,174312,296536, %T A027165 1147657,1837307,5643506,9657582,37349067,60103305,185313180, %U A027165 318533124,1230555661,1988344759,6145979174,10601082970,40907870479 %N A027165 T(n,0) + T(n,1) + ... + T(n,[ n/2 ]), T given by A027157. %K A027165 nonn %O A027165 0,2 %A A027165 _Clark Kimberling_