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A036656 Number of n-node rooted unlabeled trees with out-degree <=2 and exactly 1 edge at the root. 5
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 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,5

LINKS

Table of n, a(n) for n=0..32.

Index entries for sequences related to rooted trees

MAPLE

G036656 := G001190-x; A036656 := n->coeff(G036656, x, n);

CROSSREFS

Except for initial terms, same as A001190.

Sequence in context: A247139 A036591 A036592 * A001190 A274937 A199142

Adjacent sequences:  A036653 A036654 A036655 * A036657 A036658 A036659

KEYWORD

nonn

AUTHOR

N. J. A. Sloane.

STATUS

approved

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Last modified September 24 04:27 EDT 2017. Contains 292403 sequences.