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A120103
Number of polyominoes consisting of 9 regular unit n-gons.
7
160, 1285, 14445, 6572, 14982, 65323, 280014, 664411, 1908239, 1314914, 1968684, 4158216, 9707046, 17054708, 33522023, 26019735, 33942901, 56537856, 100952307, 153177526, 251530341, 208524646, 254079408, 374310135, 586169115, 812395658
OFFSET
3,1
LINKS
Matthias Koch and Sascha Kurz, Enumeration of generalized polyominoes, preprint, arXiv:math.CO/0605144
EXAMPLE
a(3)=160 because there are 160 polyiamonds consisting of 9 triangles and a(4)=1285 because there are 1285 polyominoes consisting of 9 squares.
KEYWORD
nonn
AUTHOR
Sascha Kurz, Jun 09 2006
STATUS
approved