A111375 - OEIS

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A111375

Let qf(a,q) = Product(1-a*q^j,j=0..infinity); g.f. is qf(q,q^7)*qf(q^2,q^7)*qf(q^4,q^7)/(qf(q^3,q^7)*qf(q^5,q^7)*qf(q^6,q^7)).

1, -1, -1, 2, -2, 1, 3, -5, 0, 3, -1, 0, 3, -2, -8, 9, 1, -7, 10, -6, -5, 3, 3, 3, -6, 9, -9, -8, 10, 2, 8, -13, 6, -7, -17, 34, -1, -10, -5, 2, -8, -11, 50, -20, -21, 16, -16, -5, 5, 56, -37, -31, 35, -40, 12, 29, 40, -56, -40, 62, -58, 29, 52, 11, -73, -41, 99, -98, 56, 98, -66, -73, -24, 114, -120, 100, 125, -179, -33, -10, 117, -111

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

OFFSET

0,4

COMMENTS

Suggested by A003823.

LINKS

Table of n, a(n) for n=0..81.

MAPLE

M:=100; qf:=(a, q)->mul(1-a*q^j, j=0..M); t7:=qf(q, q^7)*qf(q^2, q^7)*qf(q^4, q^7)/(qf(q^3, q^7)*qf(q^5, q^7)*qf(q^6, q^7)); series(%, q, M); seriestolist(%);

CROSSREFS

Cf. A003823, A111374, A111376.

Sequence in context: A065185 A289412 A266504 * A165997 A046752 A086350

Adjacent sequences: A111372 A111373 A111374 * A111376 A111377 A111378

KEYWORD

sign

AUTHOR

N. J. A. Sloane, Nov 09 2005

STATUS

approved