login
The OEIS is supported by the many generous donors to the OEIS Foundation.

 

Logo
Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A120626 Least number k such that the k-th Catalan number C(2k,k)/(k+1) is divisible by n!. 5
1, 2, 5, 14, 14, 46, 46, 382, 446, 1662, 1662, 3582, 3582, 4094, 4094, 130942, 130942, 458238, 458238, 1040382, 1046526, 2883582, 3129342, 16760830, 16760830, 56623102, 66584318, 367001598, 367001598, 670826494, 670826494, 8589672446, 12348030974 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Max Alekseyev, Table of n, a(n) for n = 1..189

MATHEMATICA

f[0] = 1, f[n_] := Block[{k = f[n - 1]}, While[ !IntegerQ[ Binomial[2k, k]/(n!(k + 1))], k++ ]; k]; Array[f, 20]

CROSSREFS

Cf. A000108.

Sequence in context: A289682 A151854 A146526 * A046058 A137271 A131356

Adjacent sequences: A120623 A120624 A120625 * A120627 A120628 A120629

KEYWORD

nonn

AUTHOR

Robert G. Wilson v, Jun 19 2006

EXTENSIONS

More terms from Ryan Propper, Oct 13 2006

Further terms from Ryan Propper, Dec 25 2007

Further terms from Max Alekseyev, Feb 04 2008

STATUS

approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recents
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified February 2 15:52 EST 2023. Contains 360022 sequences. (Running on oeis4.)