0,1

Continued fraction expansion of 3+sqrt(10). - Bruno Berselli, Mar 15 2011

Also, decimal expansion of Sum_{n >= 0} n/binomial(2*n+1, n) = 2/3. - Bruno Berselli, Sep 14 2015

Decimal expansion of 2/3. - Franklin T. Adams-Watters, Feb 23 2019

Table of n, a(n) for n=0..80.

INRIA Algorithms Project, Encyclopedia of Combinatorial Structures 1014

Tanya Khovanova, Recursive Sequences

Index to divisibility sequences

Index entries for linear recurrences with constant coefficients, signature (1).

G.f.: 6/(1-x). - Bruno Berselli, Mar 15 2011

E.g.f.: 6*e^x. - Vincenzo Librandi, Jan 27 2012

a(n) = floor(1/(-n + csc(1/n))). - Clark Kimberling, Mar 10 2020

(PARI) a(n)=6 \\ Charles R Greathouse IV, Sep 28 2015

Cf. A145429: decimal expansion of Sum_{n >= 0) n/binomial(2*n, n).

Sequence in context: A269348 A165057 A165059 * A020793 A021019 A177057

Adjacent sequences: A010719 A010720 A010721 * A010723 A010724 A010725

nonn,easy

N. J. A. Sloane

approved