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%I #4 May 19 2020 07:26:07
%S 1,1,4,11,4,10,30,31,4,10,30,30,28,80,122,71,4,10,30,30,28,80,122,70,
%T 28,80,120,116,216,404,386,151,4,10,30,30,28,80,122,70,28,80,120,116,
%U 216,404,386,150,28,80,120,116,216,404,384,196,216,400,472,664,1240,1580,1074,311
%N a(0)=1; a(1)=1; a(2)=4; for n>=3 if n=2^i + j with 0<=j<2^i then a(n)=2*a(j) + 2*a(j + 1) except we add 1 if j=2^i-1.
%F I would very much like a g.f. for this sequence!
%Y Cf. A151843-A151874.
%K nonn
%O 0,3
%A _N. J. A. Sloane_, Jul 17 2009
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