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!)

A221841 as a simple table

n a(n)
1 1
2 0
3 0
4 1
5 0
6 1
7 2
8 6
9 16
10 56
11 183
12 657
13 2277
14 8813
15 34178
16 137578
17 558734
18 2285694 

[1,0,0,1,0,1,2,6,16,56,183,657,2277,8813,34178,
 137578,558734,2285694]

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 23 20:33 EDT 2024. Contains 371916 sequences. (Running on oeis4.)