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A036656
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Number of n-node rooted unlabeled trees with outdegree <= 2 and exactly 1 edge at the root.
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7
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0, 0, 1, 1, 2, 3, 6, 11, 23, 46, 98, 207, 451, 983, 2179, 4850, 10905, 24631, 56011, 127912, 293547, 676157, 1563372, 3626149, 8436379, 19680277, 46026618, 107890609, 253450711, 596572387, 1406818759, 3323236238, 7862958391
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