A036641 - OEIS

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A036641

Number of 6-ary rooted trees with n nodes and height exactly 3.

0, 0, 0, 1, 2, 4, 6, 10, 14, 19, 24, 31, 37, 46, 52, 61, 68, 76, 81, 88, 90, 94, 94, 94, 90, 88, 81, 76, 68, 61, 52, 46, 37, 31, 24, 19, 14, 11, 7, 5, 3, 2, 1, 1

(list; graph; refs; listen; history; text; internal format)

OFFSET

0,5

LINKS

Table of n, a(n) for n=0..43.

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: A007782 A035501 A024204 * A260732 A062425 A121386

Adjacent sequences: A036638 A036639 A036640 * A036642 A036643 A036644

KEYWORD

nonn,fini,full

AUTHOR

N. J. A. Sloane.

STATUS

approved