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A238258 Decimal expansion of a constant related to A002465. 3
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 (list; constant; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..105.

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

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)).

EXAMPLE

3.08827730474174017911584...

MATHEMATICA

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

CROSSREFS

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

Sequence in context: A201580 A234518 A068458 * A011082 A189969 A021768

Adjacent sequences:  A238255 A238256 A238257 * A238259 A238260 A238261

KEYWORD

nonn,cons

AUTHOR

Vaclav Kotesovec, Feb 21 2014

STATUS

approved

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Last modified April 17 11:26 EDT 2021. Contains 343064 sequences. (Running on oeis4.)