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!)

A053509 as a simple table

n a(n)
1 0
2 0
3 0
4 0
5 1
6 30
7 735
8 17920
9 459270
10 12600000
11 372027810
12 11824496640
13 403786706895
14 14772648450560
15 577227041015625
16 24013333950627840
17 1060372471758165020
18 49558656380297379840
19 2444960458495625410260
20 127008768000000000000000

[0,0,0,0,1,30,735,17920,459270,12600000,372027810,
 11824496640,403786706895,14772648450560,
 577227041015625,24013333950627840,
 1060372471758165020,49558656380297379840,
 2444960458495625410260,127008768000000000000000]

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 August 15 08:18 EDT 2024. Contains 375173 sequences. (Running on oeis4.)