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A120103
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Number of polyominoes consisting of 9 regular unit n-gons.
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7
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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
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OFFSET
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3,1
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LINKS
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EXAMPLE
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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.
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CROSSREFS
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Cf. A000577, A000104, A000105, A000228, A103465, A103466, A103467, A103468, A103469, A103470, A103471, A103472, A103473, A103465, A120102, A120104.
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KEYWORD
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nonn
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AUTHOR
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STATUS
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approved
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