A329511 Expansion of (1 + x)*(1 + x^2)^2*(1 + x - x^3) / (1 - x).

1, 3, 6, 9, 11, 11, 10, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8

Offset

0,2

Links

Table of n, a(n) for n=0..83.

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

Formula

a(n) = 8 for n >= 8.

Mathematica

PadRight[{1, 3, 6, 9, 11, 11, 10, 9}, 100, 8] (* Paolo Xausa, Jul 08 2026 *)

Prog

(PARI) Vec((1 + x)*(1 + x^2)^2*(1 + x - x^3) / (1 - x) + O(x^80)) \\ Colin Barker, Nov 23 2019

Crossrefs

Row 4 of array in A329508.

Sequence in context: A224353 A224012 A340491 * A065940 A358350 A024795

Adjacent sequences: A329508 A329509 A329510 * A329512 A329513 A329514

Keyword

nonn,easy,changed

Author

N. J. A. Sloane, Nov 22 2019

Status

approved