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A245143
Number of n-node unlabeled rooted trees with thickening limbs and root outdegree (branching factor) 3.
2
1, 0, 0, 1, 1, 1, 3, 3, 5, 9, 12, 17, 32, 42, 64, 106, 157, 232, 379, 563, 866, 1362, 2081, 3186, 5028, 7710, 11924, 18659, 28938, 44842, 70254, 109245, 170266, 266562, 416378, 650513, 1020431, 1597803, 2504070, 3932672, 6174777, 9698203, 15258753, 24005178
OFFSET
4,7
LINKS
CROSSREFS
Column k=3 of A245151.
Sequence in context: A078028 A317142 A279375 * A350393 A325849 A104220
KEYWORD
nonn
AUTHOR
Alois P. Heinz, Jul 12 2014
STATUS
approved