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A115639 First column of divide-and-conquer triangle A115636. 2

%I

%S 1,1,4,4,4,4,16,16,16,16,16,16,16,16,64,64,64,64,64,64,64,64,64,64,64,

%T 64,64,64,64,64,256,256,256,256,256,256,256,256,256,256,256,256,256,

%U 256,256,256,256,256,256,256,256,256,256,256,256,256,256,256,256,256,256

%N First column of divide-and-conquer triangle A115636.

%F G.f.: (1/(1-x))(1/4+(3/4)*sum{k>=1, 4^(k-1)x^(2^k-2)}).

%K easy,nonn

%O 0,3

%A _Paul Barry_, Jan 27 2006

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Last modified September 26 11:15 EDT 2021. Contains 347665 sequences. (Running on oeis4.)