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A106235 Triangle of the numbers of different forests of m rooted trees of smallest order 2, i.e., without isolated vertices. +0
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0, 1, 0, 2, 0, 0, 4, 1, 0, 0, 9, 2, 0, 0, 0, 20, 7, 1, 0, 0, 0, 48, 17, 2, 0, 0, 0, 0, 115, 48, 7, 1, 0, 0, 0, 0, 286, 124, 21, 2, 0, 0, 0, 0, 0, 719, 336, 60, 7, 1, 0, 0, 0, 0, 0, 1842, 888, 171, 21, 2, 0, 0, 0, 0, 0, 0, 4766, 2393, 488, 65, 7, 1, 0, 0 (list; table; graph; listen)
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Last modified November 30 13:13 EST 2009. Contains 167758 sequences.


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