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!)

A121767 as a simple table

n a(n)
1 0
2 1
3 4
4 26
5 148
6 908
7 5600
8 35358
9 225900
10 1460495
11 9528580
12 62659826
13 414794388
14 2761665143
15 18478780624
16 124186579380
17 837825377160
18 5671852529106
19 38515222492016
20 262266364986772
21 1790362225181496

[0,1,4,26,148,908,5600,35358,225900,1460495,
 9528580,62659826,414794388,2761665143,18478780624,
 124186579380,837825377160,5671852529106,
 38515222492016,262266364986772,1790362225181496]

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 April 24 08:21 EDT 2024. Contains 371926 sequences. (Running on oeis4.)