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!)

A018955 as a simple table

n a(n)
2 1
3 13
4 28
5 270
6 1176
7 7952
8 43772
9 285525
10 1808560
11 12186394
12 82828916
13 578556693
14 4088706356
15 29246505510
16 210592755064

[1,13,28,270,1176,7952,43772,285525,1808560,
 12186394,82828916,578556693,4088706356,
 29246505510,210592755064]

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 May 25 10:05 EDT 2022. Contains 354066 sequences. (Running on oeis4.)