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A036642 Number of 6-ary rooted trees with n nodes and height exactly 4. 0
0, 0, 0, 0, 1, 3, 8, 18, 38, 76, 144, 266, 476, 841, 1452, 2482, 4179, 6978, 11515, 18876, 30642, 49435, 79116, 125850, 198771, 312136, 486940, 755359, 1164573, 1785513, 2721539, 4125699, 6218982, 9324110, 13902897, 20620486, 30419728 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,6

LINKS

Table of n, a(n) for n=0..36.

Index entries for sequences related to rooted trees

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.

CROSSREFS

Sequence in context: A261325 A261446 A078409 * A000235 A006478 A104187

Adjacent sequences:  A036639 A036640 A036641 * A036643 A036644 A036645

KEYWORD

nonn,fini

AUTHOR

N. J. A. Sloane.

STATUS

approved

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Last modified April 18 08:37 EDT 2019. Contains 322209 sequences. (Running on oeis4.)