OFFSET
1,3
REFERENCES
Steven R. Finch, Mathematical Constants, Cambridge University Press, 2003, Section 5.6 Otter's Tree Enumeration Constants, p. 304.
LINKS
Eric Weisstein's World of Mathematics, Tree.
FORMULA
Average distance for n vertices ~ (1/2)*(2*Pi/beta)^(1/3)*n^(1/2).
EXAMPLE
1.1365599187866006432360343661409534473438228750343833261672638156843...
MATHEMATICA
beta = 0.53494960614230701455037971105206839814311651405699009397707681023752321788064067239783; (* after A086308 and Vaclav Kotesovec's computation *) RealDigits[(1/2)*(2*Pi/beta)^(1/3), 10, 85] // First
CROSSREFS
KEYWORD
AUTHOR
Jean-François Alcover, Jul 28 2014
STATUS
approved