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 A025576 #3 Mar 30 2012 18:56:04 %S A025576 1,4,10,22,61,120,356,665,2058,3732,11892,21153,68860,120835,399828, %T A025576 694590,2328066,4013088,13591364,23284424,79538750,135580865, %U A025576 466489520,791862354,2741310614,4637009300,16137748980,27215510265,95152639095,160053426720 %N A025576 a(n) = T(n,[ n/2 ]+1), where T is the array defined in A025564. %K A025576 nonn %O A025576 1,2 %A A025576 _Clark Kimberling_