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A108522 Number of increasing rooted trees with n generators. 2
1, 2, 9, 70, 771, 10948, 190205, 3907494, 92654059, 2490459468, 74827519077, 2485153213814, 90403692195179, 3574835773247140, 152675377606343901, 7003761877546096278, 343454890456254782203, 17929588055863943650988 (list; graph; refs; listen; history; internal format)
OFFSET

1,2

COMMENTS

A generator is a leaf or a node with just one child.

In an increasing rooted tree, nodes are numbered and numbers increase as you move away from root.

LINKS

Index entries for sequences related to rooted trees

FORMULA

E.g.f. satisfies 2*A(x) = x - 1 + A'(x) + exp(A(x))

CROSSREFS

Cf. A108521-A108529, A007151, A001147.

Sequence in context: A121417 A201862 A167016 * A014500 A101482 A099717

Adjacent sequences:  A108519 A108520 A108521 * A108523 A108524 A108525

KEYWORD

nonn

AUTHOR

Christian G. Bower (bowerc(AT)usa.net), Jun 07 2005

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Last modified February 14 10:43 EST 2012. Contains 205614 sequences.