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!)

A221512 as a simple table

n a(n)
1 0
2 4
3 13
4 80
5 381
6 1970
7 9940
8 50495
9 255980
10 1298632
11 6586395
12 33407907
13 169448914
14 859472004
15 4359369001
16 22111382192
17 112152257687
18 568853184739
19 2885309153794
20 14634723355722
21 74229524701062
22 376503348140640

[0,4,13,80,381,1970,9940,50495,255980,1298632,
 6586395,33407907,169448914,859472004,4359369001,
 22111382192,112152257687,568853184739,
 2885309153794,14634723355722,74229524701062,
 376503348140640]

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 August 17 05:07 EDT 2022. Contains 356184 sequences. (Running on oeis4.)