A173245 O.g.f. (x + 1)^10/ (sum_{i=0..10} x^i) .

1, 9, 35, 75, 90, 42, -42, -90, -75, -35, -9, 0, 9, 35, 75, 90, 42, -42, -90, -75, -35, -9, 0, 9, 35, 75, 90, 42, -42, -90, -75, -35, -9, 0, 9, 35, 75, 90, 42, -42, -90, -75, -35, -9, 0, 9, 35, 75, 90, 42, -42

Offset

0,2

Comments

Periodic with period length 11.

Links

Table of n, a(n) for n=0..50.

Index entries for linear recurrences with constant coefficients, signature (-1, -1, -1, -1, -1, -1, -1, -1, -1, -1).

Formula

G.f. (1-x^2)*(1+x)^9/(1-x^11), not completely reduced.

Mathematica

p[x_] = (x + 1)^10/Sum[x^i, {i, 0, 10}];
a = Table[SeriesCoefficient[ Series[p[x], {x, 0, 50}], n], {n, 0, 50}]

Crossrefs

Sequence in context: A339995 A085366 A304913 * A033566 A226755 A022275

Adjacent sequences: A173242 A173243 A173244 * A173246 A173247 A173248

Keyword

sign,easy,less

Author

Roger L. Bagula, Feb 13 2010

Extensions

Dummy variables removed by the Assoc. Editors of the OEIS, Mar 10 2010.

Status

approved