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!)

A080021 as a simple table

n a(n)
1 2
2 3
3 7
4 20
5 148
6 403
7 1096
8 1097
9 2980
10 2981
11 8103
12 59874
13 162755
14 442413
15 1202604
16 3269017
17 8886110
18 8886111
19 24154952
20 24154953
21 65659969
22 178482301
23 3584912846
24 9744803446
25 26489122130
26 72004899337
27 195729609428

[2,3,7,20,148,403,1096,1097,2980,2981,8103,59874,
 162755,442413,1202604,3269017,8886110,8886111,
 24154952,24154953,65659969,178482301,3584912846,
 9744803446,26489122130,72004899337,195729609428]

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified January 23 03:15 EST 2022. Contains 350504 sequences. (Running on oeis4.)