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A164562 Taylor series coefficients of phi(-q^3)phi(q)/phi(q^2), where phi is Euler's function 0
1, -1, 0, 0, 0, -1, -1, 1, 1, 0, 0, 1, 0, 0, -1, 0, 1, 0, -1, 1, 0, -1, -1, 1, 1, -1, -1, 1, 0, -1, -1, 1, 1, -1, -1, 1, 1, -1, -1, 2, 2, -1, -1, 1, 1, -1, -2, 1, 2, -2, -1, 2, 1, -2, -2, 2, 3, -2, -2, 2 (list; graph; refs; listen; history; internal format)
OFFSET

0,40

LINKS

Wikipedia, Euler function

FORMULA

G.f.: phi(-q^3)phi(q)/phi(q^2) = a(0) + a(1)q + a(2)q^2 + ... |a(n)|<2 for n<39 |a(n)|<3 for n<56

CROSSREFS

Matches 0th through 11th terms of A113687, also related to the Euler function.

Sequence in context: A126389 A105551 A073772 * A058188 A070000 A037803

Adjacent sequences:  A164559 A164560 A164561 * A164563 A164564 A164565

KEYWORD

sign

AUTHOR

Gary Hinger (ghinger(AT)gmail.com), Aug 16 2009

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Last modified February 17 14:50 EST 2012. Contains 206050 sequences.