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!)

A081686 as a simple table

n a(n)
0 1
1 1
2 -1
3 19
4 467
5 5611
6 53459
7 455659
8 3648707
9 28119691
10 211372019
11 1562038699
12 11405181347
13 82545287371
14 593501306579
15 4245828252139
16 30255066944387
17 214924122640651
18 1522971386761139
19 10770190567911979
20 76039651374633827
21 536127709619251531 

[1,1,-1,19,467,5611,53459,455659,3648707,28119691,
 211372019,1562038699,11405181347,82545287371,
 593501306579,4245828252139,30255066944387,
 214924122640651,1522971386761139,
 10770190567911979,76039651374633827,
 536127709619251531]

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 April 24 14:12 EDT 2024. Contains 371960 sequences. (Running on oeis4.)