A120102 - OEIS

A120102

Number of polyominoes consisting of 8 regular unit n-gons.

66, 369, 2812, 1448, 2876, 10102, 34838, 73675, 181127, 131801, 185297, 352375, 725869, 1180526, 2104485, 1694978, 2123088, 3291481, 5402087, 7739008, 11832175, 10079003, 11917261, 16624712, 24389611, 32317393, 45260884

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OFFSET

3,1

LINKS

Table of n, a(n) for n=3..29.

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

EXAMPLE

a(3)=66 because there are 66 polyiamonds consisting of 8 triangles and a(4)=369 because there are 369 polyominoes consisting of 8 squares.

CROSSREFS

Cf. A000577, A000104, A000228, A103465, A103466, A103467, A103468, A103469, A103470, A103471, A103472, A103473, A103465, A120103, A120104.

Sequence in context: A251048 A259292 A258958 * A244286 A223444 A084027

Adjacent sequences: A120099 A120100 A120101 * A120103 A120104 A120105

KEYWORD

nonn

AUTHOR

Sascha Kurz, Jun 09 2006

STATUS

approved