login
Decimal expansion of a constant related to A002465.
4

%I #10 Mar 01 2021 01:50:39

%S 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,

%T 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,

%U 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

%N Decimal expansion of a constant related to A002465.

%H V. Kotesovec, <a href="https://oeis.org/wiki/User:Vaclav_Kotesovec">Non-attacking chess pieces</a>, 6ed, 2013, p.249

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

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

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

%e 3.08827730474174017911584...

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

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

%K nonn,cons

%O 1,1

%A _Vaclav Kotesovec_, Feb 21 2014