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A036617 Number of 5-ary rooted trees with n nodes and height at most 6. +0
1
1, 1, 1, 2, 4, 9, 20, 46, 105, 243, 556, 1269, 2873, 6486, 14555, 32556, 72517, 161032, 356396, 786610, 1731228, 3800671, 8323071, 18184612, 39640861, 86228722, 187177522, 405493600, 876728251, 1892008416, 4075471821, 8762948485 (list; graph; listen)
OFFSET

0,4

LINKS

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: A000632 A090245 A006958 this_sequence A007902 A057417 A000968

Adjacent sequences: A036614 A036615 A036616 this_sequence A036618 A036619 A036620

KEYWORD

nonn,fini

AUTHOR

N. J. A. Sloane (njas(AT)research.att.com).

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Last modified December 11 12:57 EST 2009. Contains 170656 sequences.


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