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Number of ways of writing n as a sum of exactly 4 powers of 2.
9

%I #5 Oct 01 2018 10:14:30

%S 0,0,0,0,1,1,1,2,2,1,2,2,2,2,3,1,2,1,2,2,3,2,3,1,2,2,3,1,3,1,1,0,2,1,

%T 2,2,3,2,3,1,3,2,3,1,3,1,1,0,2,2,3,1,3,1,1,0,3,1,1,0,1,0,0,0,2,1,2,2,

%U 3,2,3,1,3,2,3,1,3,1,1,0,3,2,3,1,3,1,1,0,3,1,1,0,1,0,0,0,2,2,3,1,3,1,1,0,3

%N Number of ways of writing n as a sum of exactly 4 powers of 2.

%C The powers do not need to be distinct.

%H Alois P. Heinz, <a href="/A089049/b089049.txt">Table of n, a(n) for n = 0..20000</a>

%Y A column of A089052. Cf. A036987, A075897, A089048, A089050, A089051, A089053.

%K nonn

%O 0,8

%A _N. J. A. Sloane_, Dec 03 2003