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 A094537 #7 Mar 30 2012 17:37:42
%S A094537 0,0,1,2,5,10,22,44,91,182,370,740,1490,2980,5980,11960,23957,47914,
%T A094537 95902,191804,383750,767500,1535284,3070568,6141694,12283388,24567892,
%U A094537 49135784,98273780,196547560,393099544,786199088,1572406987,3144813974
%N A094537 A094536/2.
%F A094537 Let b(0)=1; b(n)=2*b(n-1)-1/2*(1+(-1)^n)*b([n/2]); a(n)=2^(n-1)-b(n)/2 - _Farideh Firoozbakht_, Jun 10 2004
%t A094537 b[0]=1;b[n_]:=b[n]=2*b[n-1]-(1+(-1)^n)/2*b[Floor[n/2]]; a[n_]:=2^(n-1)-b[n]/2;Table[a[n], {n, 0, 35}]
%Y A094537 Cf. A003000, A094536.
%K A094537 nonn,easy
%O A094537 0,4
%A A094537 _N. J. A. Sloane_, Jun 06 2004
%E A094537 More terms from _Farideh Firoozbakht_, Jun 10 2004