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A036620 Number of 5-ary rooted trees with n nodes and height at most 9. 0
1, 1, 1, 2, 4, 9, 20, 47, 112, 277, 692, 1756, 4483, 11525, 29688, 76620, 197745, 510234, 1315348, 3387687, 8715037, 22395482, 57487071, 147411172, 377624359, 966473181, 2471400115, 6314595259, 16121970455, 41132128662, 104870142461 (list; graph; refs; listen; history; text; internal format)
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: A058386 A095980 A036619 * A036721 A014267 A089405

Adjacent sequences:  A036617 A036618 A036619 * A036621 A036622 A036623

KEYWORD

nonn,fini

AUTHOR

N. J. A. Sloane.

STATUS

approved

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Last modified February 22 04:58 EST 2020. Contains 332115 sequences. (Running on oeis4.)