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A308409
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Number of bond trees with n bonds on the square lattice.
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1
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1, 2, 6, 22, 87, 364, 1574, 6986, 31581, 144880, 672390, 3150362, 14877317, 70726936, 338158676
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OFFSET
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0,2
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COMMENTS
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a(n-1) is the number of bond trees with n sites (vertices) on the square lattice.
a(n) is the number of fixed polyedges (A096267) with n edges and no cycles.
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LINKS
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CROSSREFS
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KEYWORD
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nonn,more
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AUTHOR
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STATUS
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approved
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