The OEIS mourns the passing of Jim Simons and is grateful to the Simons Foundation for its support of research in many branches of science, including the OEIS.
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!)

A106567 as a simple table

n a(n)
0 0
1 4
2 20
3 116
4 660
5 3764
6 21460
7 122356
8 697620
9 3977524
10 22678100
11 129300596
12 737215380
13 4203279284
14 23965257940
15 136639406836
16 779058065940
17 4441847957044
18 25325472048980
19 144394752073076
20 823275648561300
21 4693957251098804
22 26762888849739220

[0,4,20,116,660,3764,21460,122356,697620,3977524,
 22678100,129300596,737215380,4203279284,
 23965257940,136639406836,779058065940,
 4441847957044,25325472048980,144394752073076,
 823275648561300,4693957251098804,
 26762888849739220]

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 15 17:15 EDT 2024. Contains 372548 sequences. (Running on oeis4.)