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A329509 Expansion of (1 + x)*(1 + x + x^2 - x^3) / (1 - x). 1
1, 3, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

LINKS

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

FORMULA

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

CROSSREFS

Row 2 of array in A329508.

Sequence in context: A306224 A189202 A153098 * A119280 A307634 A265222

Adjacent sequences:  A329506 A329507 A329508 * A329510 A329511 A329512

KEYWORD

nonn,easy

AUTHOR

N. J. A. Sloane, Nov 22 2019

STATUS

approved

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Last modified April 6 11:51 EDT 2020. Contains 333273 sequences. (Running on oeis4.)