login
The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

 

Logo


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

A002018 as a simple table

n a(n)
0 1
1 1
2 4
3 33
4 480
5 11010
6 367560
7 16854390
8 1016930880
9 78124095000
10 7446314383200
11 862332613342200
12 119261328828364800
13 19415283189746043600
14 3675162134109650184000
15 800409618620667941886000
16 198730589981586780813696000
17 55800304882692417053710704000

[1,1,4,33,480,11010,367560,16854390,1016930880,
 78124095000,7446314383200,862332613342200,
 119261328828364800,19415283189746043600,
 3675162134109650184000,800409618620667941886000,
 198730589981586780813696000,
 55800304882692417053710704000]

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

License Agreements, Terms of Use, Privacy Policy. .

Last modified January 24 16:47 EST 2020. Contains 331209 sequences. (Running on oeis4.)