A036624 Number of 6-ary rooted trees with n nodes and height at most 7.

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

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