A143605 Polynomial expansion sequence : p(x)=1 + x - x^5 + x^9 + x^10.

1, -1, 1, -1, 1, 0, -1, 2, -3, 3, -3, 2, 0, -3, 5, -7, 8, -7, 4, 1, -7, 13, -17, 19, -16, 8, 4, -18, 32, -42, 44, -36, 16, 13, -47, 79, -101, 103, -80, 31, 40, -121, 195, -241, 240, -178, 55, 117, -309, 478, -575

Offset

1,8

Links

Table of n, a(n) for n=1..51.

Formula

p(x)=1 + x - x^5 + x^9 + x^10; a(n)=expansion_coefficients(x^10*p(1/x)),

Mathematica

f[x_] = 1 + x - x^5 + x^9 + x^10; g[x] = ExpandAll[x^10*f[1/x]]; a = Table[SeriesCoefficient[Series[1/g[x], {x, 0, 50}], n], {n, 0, 50}]

Crossrefs

Sequence in context: A207814 A062745 A140733 * A098418 A364367 A128080

Adjacent sequences: A143602 A143603 A143604 * A143606 A143607 A143608

Keyword

sign

Author

Roger L. Bagula, Oct 26 2008

Status

approved