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A329506 Expansion of (1 + x)*(1 + 2*x + 2*x^2 - 2*x^3) / (1 - x). 1
1, 4, 8, 8, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

LINKS

Table of n, a(n) for n=0..84.

FORMULA

a(n) = 6 for n >= 4.

PROG

(PARI) Vec((1 + x)*(1 + 2*x + 2*x^2 - 2*x^3) / (1 - x) + O(x^80)) \\ Colin Barker, Nov 21 2019

CROSSREFS

Row 3 of array in A329504.

Sequence in context: A114610 A200390 A137209 * A032566 A330555 A200357

Adjacent sequences:  A329503 A329504 A329505 * A329507 A329508 A329509

KEYWORD

nonn,easy

AUTHOR

N. J. A. Sloane, Nov 20 2019

STATUS

approved

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Last modified April 21 11:24 EDT 2021. Contains 343150 sequences. (Running on oeis4.)