login
The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)

A181998 as a simple table

n a(n)
0 1
1 1
2 3
3 18
4 124
5 935
6 7443
7 61510
8 522467
9 4532452
10 39985628
11 357641094
12 3235846003
13 29565353095
14 272429349163
15 2528938553028
16 23629834081955
17 222080711420655
18 2098112946860819
19 19915641133236764
20 189853287434733709
21 1816924035668823659
22 17450483777418686431

[1,1,3,18,124,935,7443,61510,522467,4532452,
 39985628,357641094,3235846003,29565353095,
 272429349163,2528938553028,23629834081955,
 222080711420655,2098112946860819,
 19915641133236764,189853287434733709,
 1816924035668823659,17450483777418686431]

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 May 28 14:47 EDT 2020. Contains 334684 sequences. (Running on oeis4.)