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A036630 Number of 4-ary rooted trees with n nodes and height exactly 6. 0
0, 0, 0, 0, 0, 0, 1, 5, 19, 61, 175, 469, 1199, 2961, 7121, 16784, 38880, 88832, 200494, 447897, 991350, 2176646, 4744087, 10272514, 22109412, 47325774, 100786897, 213634174, 450844166, 947545289, 1983774852, 4138099947 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,8

LINKS

Table of n, a(n) for n=0..31.

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: A124123 A189714 A128638 * A102841 A036637 A036644

Adjacent sequences:  A036627 A036628 A036629 * A036631 A036632 A036633

KEYWORD

nonn,fini

AUTHOR

N. J. A. Sloane.

STATUS

approved

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Last modified May 21 21:07 EDT 2013. Contains 225504 sequences.