A036631 Number of 4-ary rooted trees with n nodes and height exactly 7.

0, 0, 0, 0, 0, 0, 0, 1, 6, 26, 94, 302, 900, 2546, 6931, 18341, 47474, 120750, 302741, 750050, 1839421, 4471759, 10787891, 25849612, 61564934, 145828769, 343713516, 806462038, 1884353462, 4386038531, 10172642984, 23515472829, 54190799650

Offset

0,9

Links

Sean A. Irvine, Table of n, a(n) for n = 0..5460

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: A032169 A032196 A011780 * A224288 A036638 A036645

Adjacent sequences: A036628 A036629 A036630 * A036632 A036633 A036634

Keyword

nonn,fini,full

Author

N. J. A. Sloane.

Status

approved