A103466 Number of polyominoes consisting of n regular unit octagons.

1, 1, 3, 11, 50, 269, 1605, 10102, 65323, 430302, 2868320, 19299334, 130807068, 892075515, 6115673262

Offset

1,3

Links

Table of n, a(n) for n=1..15.

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, A103465, A103467, A103468.

Cf. A000577, A000104, A000228, A103465, A103467, A103468, A103469, A103470, A103471, A103472, A103473, A115071, A120102, A120103, A120104.

Sequence in context: A162477 A115081 A323672 * A346762 A354323 A230961

Adjacent sequences: A103463 A103464 A103465 * A103467 A103468 A103469

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