A193490 Number of rooted trees with n nodes and omega-valency 5.

0, 0, 0, 0, 0, 0, 1, 1, 8, 15, 70, 165, 608, 1601, 5259, 14564, 45040, 127521, 381691, 1090130, 3202382, 9171574, 26642413, 76312777, 220134939, 629965221, 1808975528, 5170502225, 14801940226, 42257089390

Offset

1,9

Comments

See A003120 for definitions.

Links

Table of n, a(n) for n=1..30.

J.-C. Arditti, Dénombrement des arborescences dont le graphe de comparabilité est Hamiltonien, Discrete Math., 5 (1973), 189-200.

Crossrefs

Cf. A003120, A193487, A193488, A193489, A193491.

Sequence in context: A161342 A048732 A185038 * A015442 A253211 A275246

Adjacent sequences: A193487 A193488 A193489 * A193491 A193492 A193493

Keyword

nonn

Author

N. J. A. Sloane, Jul 27 2011

Status

approved