0,6

Number of ways to write n as an ordered sum of 4 powers of 2. - Ilya Gutkovskiy, Feb 02 2021

Robert Israel, Table of n, a(n) for n = 0..10000

N:= 10: # for a(0) .. a(2^N)

g:= add(x^(2^i), i=0..N)^4:

S:= series(g, x, 2^N+1):

seq(coeff(S, x, j), j=0..2^N); # Robert Israel, Mar 27 2020

Cf. A151758.

Sequence in context: A338927 A286373 A286372 * A273938 A121613 A008438

Adjacent sequences: A151757 A151758 A151759 * A151761 A151762 A151763

nonn

N. J. A. Sloane, Jun 22 2009

approved