A078659 - OEIS

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A078659

Expansion of 1/Product_{ n >= 2, n not of the form 2^k-1 } (1+x^n).

1, 0, -1, 0, 0, -1, -1, 1, 1, -1, 0, 1, 0, -1, 0, 2, 1, -1, 0, 1, 0, -2, 0, 2, 0, -2, 0, 1, -1, -2, 0, 3, 1, -3, 0, 2, -1, -4, 1, 4, -1, -3, 1, 2, -1, -4, 2, 5, 0, -4, 1, 4, -2, -5, 3, 5, -1, -5, 2, 4, -2, -6, 3, 8, -1, -8, 3, 6, -4, -9, 5, 8, -3, -9, 4, 7, -5, -11, 7, 11, -4, -12, 7, 9, -7, -13, 9, 12, -6, -14, 9, 10, -8, -16, 13, 15, -8, -17, 12

(list; graph; refs; listen; history; text; internal format)

OFFSET

0,16

LINKS

Robert Israel, Table of n, a(n) for n = 0..1000

MAPLE

G:= 1/mul(1+x^n, n = {$2..100} minus {seq(2^i-1, i=1..6)}):

S:= series(G, x, 101):

seq(coeff(S, x, i), i=0..100); # Robert Israel, Nov 03 2024

CROSSREFS

Sequence in context: A130538 A276007 A351619 * A374080 A079690 A328620

Adjacent sequences: A078656 A078657 A078658 * A078660 A078661 A078662

KEYWORD

sign,look

AUTHOR

N. J. A. Sloane, Dec 15 2002

STATUS

approved