A103467 - OEIS

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A103467

Number of polyominoes consisting of n regular unit 9-gons.

6

1, 1, 3, 14, 82, 585, 4418, 34838, 280014, 2285047, 18838395, 156644526, 1311575691

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OFFSET

1,3

LINKS

Table of n, a(n) for n=1..13.

Matthias Koch and Sascha Kurz, Enumeration of generalized polyominoes, arXiv:math/0605144 [math.CO], 2006.

S. Kurz, k-polyominoes.

CROSSREFS

Cf. A000577, A000104, A000228, A103465, A103466, A103468, A103469, A103470, A103471, A103472, A103473, A115071, A120102, A120103, A120104.

Sequence in context: A367972 A020104 A220894 * A355293 A215661 A224776

Adjacent sequences: A103464 A103465 A103466 * A103468 A103469 A103470

KEYWORD

more,nonn

AUTHOR

Sascha Kurz, Feb 07 2005

EXTENSIONS

More terms from Sascha Kurz, Jun 09 2006

Definition corrected by John Mason and Sascha Kurz, Sep 20 2020

STATUS

approved