A036623 Number of 6-ary rooted trees with n nodes and height at most 6.

1, 1, 1, 2, 4, 9, 20, 47, 107, 249, 573, 1319, 3010, 6859, 15534, 35095, 78964, 177209, 396434, 884767, 1969496, 4374573, 9694994, 21443195, 47333594, 104291391, 229373393, 503609582, 1103877079, 2415752264, 5278467730

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: A110198 A104508 A368830 * A001385 A039808 A138164

Adjacent sequences: A036620 A036621 A036622 * A036624 A036625 A036626

Keyword

nonn,fini

Author

N. J. A. Sloane.

Status

approved