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A177067
Decimal expansion of sqrt(3/(2 Pi))/e.
0
2, 5, 4, 2, 0, 0, 3, 8, 9, 2, 7, 1, 0, 3, 5, 3, 2, 1, 4, 3, 7, 2, 0, 3, 8, 9, 4, 2, 1, 4, 4, 6, 4, 7, 1, 6, 3, 4, 6, 8, 0, 3, 5, 1, 3, 2, 4, 9, 9, 3, 1, 8, 6, 3, 1, 1, 4, 5, 3, 3, 5, 8, 0, 4, 3, 3, 9, 4, 4, 5, 9, 5, 1
OFFSET
0,1
COMMENTS
This is the leading constant in the asymptotic formula for the number of labeled 2-connected (simple) graphs.
LINKS
Graeme Kemkes, Cristiane M. Sato, and Nicholas Wormald, Asymptotic enumeration of sparse 2-connected graphs, arXiv:1010.2516 [math.CO], 2010-2011. See Section 2, especially Corollary 3.
E. M. Wright, The number of connected sparsely edged graphs. IV. Large nonseparable graphs, J. Graph Theory 7 (1983), 219-229. See Theorem 4.
EXAMPLE
0.2542003...
MAPLE
evalf(sqrt(3/2/Pi)/exp(1))
MATHEMATICA
RealDigits[Sqrt[3/(2Pi)]/E, 10, 120][[1]] (* Harvey P. Dale, Jul 28 2019 *)
CROSSREFS
Sequence in context: A309771 A009738 A268647 * A055127 A152669 A324051
KEYWORD
nonn,cons
AUTHOR
Graeme Kemkes, Dec 09 2010
STATUS
approved