A238258 Decimal expansion of a constant related to A002465.

3, 0, 8, 8, 2, 7, 7, 3, 0, 4, 7, 4, 1, 7, 4, 0, 1, 7, 9, 1, 1, 5, 8, 4, 0, 0, 8, 2, 0, 2, 5, 4, 3, 8, 2, 7, 6, 8, 3, 6, 4, 4, 4, 8, 9, 7, 1, 4, 2, 0, 1, 3, 8, 7, 6, 7, 2, 4, 7, 7, 3, 0, 1, 2, 1, 7, 6, 5, 1, 6, 8, 1, 2, 7, 8, 8, 2, 6, 6, 6, 6, 9, 5, 2, 0, 3, 2, 7, 1, 1, 3, 0, 9, 6, 1, 9, 4, 6, 0, 0, 9, 7, 3, 0, 9

Offset: 1

Author

Vaclav Kotesovec, Feb 21 2014

Keywords

• nonn
• cons

Examples

			3.08827730474174017911584...
		

Links

• V. Kotesovec, Non-attacking chess pieces, 6ed, 2013, p.249

Crossrefs

Cf. A002465, A238260, A187235, A226775, A342110.

Programs

Mathematica

RealDigits[N[-2/LambertW[-2/E^2]/(2+LambertW[-2/E^2]), 105]][[1]]

Formula

Equals lim n->infinity (A002465(n)/(n-1)!)^(1/n).

Equals -2 / (LambertW(-2*exp(-2)) * (2 + LambertW(-2*exp(-2)))).

Equals -2 / (A226775 * (2 + A226775)).