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!)

A001071 as a simple table

n a(n)
1 2
2 1
3 4
4 10
5 36
6 108
7 392
8 1363
9 5000
10 18223
11 67792
12 252938
13 952540
14 3602478
15 13699554
16 52296713
17 200406388
18 770411478
19 2970401696
20 11482395526
21 44491881090
22 172766311857
23 672186650116

[2,1,4,10,36,108,392,1363,5000,18223,67792,252938,
 952540,3602478,13699554,52296713,200406388,
 770411478,2970401696,11482395526,44491881090,
 172766311857,672186650116]

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 March 28 17:25 EDT 2024. Contains 371254 sequences. (Running on oeis4.)