A036611 - OEIS

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A036611

Number of 4-ary rooted trees with n nodes and height at most 6.

1, 1, 1, 2, 4, 9, 19, 44, 99, 226, 506, 1133, 2506, 5530, 12104, 26408, 57296, 123892, 266712, 572308, 1223488, 2607429, 5538518, 11729577, 24766121, 52143714, 109475193, 229218555, 478646764, 996885485, 2070875492, 4291068343

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

OFFSET

0,4

LINKS

Sean A. Irvine, Table of n, a(n) for n = 0..1364

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: A339156 A247623 A084083 * A316473 A316501 A036612

Adjacent sequences: A036608 A036609 A036610 * A036612 A036613 A036614

KEYWORD

nonn,fini,full

AUTHOR

N. J. A. Sloane.

STATUS

approved