A036614 - OEIS

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A036614

Number of 4-ary rooted trees with n nodes and height at most 9.

1, 1, 1, 2, 4, 9, 19, 45, 106, 260, 642, 1614, 4074, 10356, 26341, 67093, 170735, 434149, 1102279, 2794856, 7075440, 17887216, 45157381, 113859010, 286737286, 721310274, 1812628225, 4550676482, 11414249153, 28605296518, 71629527442

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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: A036612 A291648 A036613 * A036718 A372102 A134964

Adjacent sequences: A036611 A036612 A036613 * A036615 A036616 A036617

KEYWORD

nonn,fini

AUTHOR

N. J. A. Sloane.

STATUS

approved