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A036624 Number of 6-ary rooted trees with n nodes and height at most 7. 0
1, 1, 1, 2, 4, 9, 20, 48, 113, 275, 667, 1627, 3951, 9597, 23215, 56063, 134982, 324340, 777492, 1860365, 4442905, 10593324, 25217480, 59944219, 142295011, 337344737, 798769090, 1889131816, 4462891151, 10531873564, 24828302752 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,4

LINKS

Table of n, a(n) for n=0..30.

E. M. Rains and N. J. A. Sloane, On Cayley's Enumeration of Alkanes (or 4-Valent Trees), J. Integer Sequences, Vol. 2 (1999), Article 99.1.1.

Index entries for sequences related to rooted trees

CROSSREFS

Sequence in context: A318852 A052329 A199883 * A226907 A186952 A034823

Adjacent sequences:  A036621 A036622 A036623 * A036625 A036626 A036627

KEYWORD

nonn,fini

AUTHOR

N. J. A. Sloane.

STATUS

approved

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Last modified November 11 22:31 EST 2019. Contains 329046 sequences. (Running on oeis4.)