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!)

A270080 as a simple table

n a(n)
0 1
1 5
2 20
3 72
4 280
5 1080
6 4216
7 16632
8 66040
9 263160
10 1050616
11 4198392
12 16785400
13 67125240
14 268468216
15 1073807352 

[1,5,20,72,280,1080,4216,16632,66040,263160,
 1050616,4198392,16785400,67125240,268468216,
 1073807352]

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 July 22 06:07 EDT 2024. Contains 374481 sequences. (Running on oeis4.)