OFFSET
1,11
COMMENTS
Also the number of nonlinear trees on n nodes. - Andrew Howroyd, Dec 17 2020
LINKS
Andrew Howroyd, Table of n, a(n) for n = 1..200
Tanay Wakhare, Eric Wityk, and Charles R. Johnson, The proportion of trees that are linear, Discrete Mathematics, 343.10 (2020): 112008. Also on arXiv, arXiv:1901.08502 [math.CO], 2019-2020. See Tables 1 and 2 (but beware errors).
Eric Weisstein's World of Mathematics, Lobster Graph
FORMULA
CROSSREFS
KEYWORD
nonn
AUTHOR
Eric W. Weisstein, May 11 2007
EXTENSIONS
a(15)-a(32) from Washington Bomfim, Feb 23 2011
STATUS
approved