Otter, Richard The number of trees. (English) Zbl 0032.12601 Ann. Math. (2) 49, 583-599 (1948). Page: −5 −4 −3 −2 −1 ±0 +1 +2 +3 +4 +5 Show Scanned Page Cited in 3 ReviewsCited in 163 Documents Keywords:Topology PDFBibTeX XMLCite \textit{R. Otter}, Ann. Math. (2) 49, 583--599 (1948; Zbl 0032.12601) Full Text: DOI Link Online Encyclopedia of Integer Sequences: Number of trees with n unlabeled nodes. Number of n-node unrooted quartic trees; number of n-carbon alkanes C(n)H(2n+2) ignoring stereoisomers. Number of 3-valent trees (= boron trees or binary trees) with n nodes. Number of 5-valent trees with n nodes. Number of 6-valent trees with n nodes. Number of trees on n unlabeled nodes with all nodes of degree <= 7.