login
This site is supported by donations to The OEIS Foundation.

 

Logo

The October issue of the Notices of the Amer. Math. Soc. has an article about the OEIS.

Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)

A247386 as a simple table

n a(n)
0 0
1 0
2 1
3 6
4 30
5 130
6 570
7 2436
8 10696
9 47160
10 213660
11 981640
12 4625016
13 22171656
14 108766840
15 543350640
16 2772404160
17 14402353216
18 76294507536
19 411229473120
20 2257073089120
21 12595032754080
22 71481175794336
23 412117251151936
24 2413922299708800
25 14352066564086400

[0,0,1,6,30,130,570,2436,10696,47160,213660,
 981640,4625016,22171656,108766840,543350640,
 2772404160,14402353216,76294507536,411229473120,
 2257073089120,12595032754080,71481175794336,
 412117251151936,2413922299708800,
 14352066564086400]

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

License Agreements, Terms of Use, Privacy Policy. .

Last modified September 22 17:05 EDT 2018. Contains 315270 sequences. (Running on oeis4.)