A177067 Decimal expansion of sqrt(3/(2 Pi))/e.

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

Table of n, a(n) for n=0..72.

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

Adjacent sequences: A177064 A177065 A177066 * A177068 A177069 A177070

Keyword

nonn,cons

Author

Graeme Kemkes, Dec 09 2010

Status

approved