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A036643 Number of 6-ary rooted trees with n nodes and height exactly 5. 1
0, 0, 0, 0, 0, 1, 4, 13, 36, 93, 225, 524, 1179, 2596, 5597, 11893, 24915, 51649, 105981, 215731, 435761, 874620, 1744890, 3463013, 6839211, 13448100, 26334344, 51374820, 99868542, 193493456, 373705537, 719606064, 1381698784, 2645695793 (list; graph; refs; listen; history; text; internal format)
OFFSET
0,7
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.
CROSSREFS
Sequence in context: A221882 A235996 A036636 * A000299 A102301 A206603
KEYWORD
nonn,fini,full
AUTHOR
STATUS
approved

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Last modified March 28 07:48 EDT 2024. Contains 371235 sequences. (Running on oeis4.)