login
This site is supported by donations to The OEIS Foundation.

 

Logo

Please make a donation to keep the OEIS running. We are now in our 55th year. In the past year we added 12000 new sequences and reached 8000 citations (which often say "discovered thanks to the OEIS"). We need to raise money to hire someone to manage submissions, which would reduce the load on our editors and speed up editing.
Other ways to donate

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

A097422 as a simple table

n a(n)
0 0
1 1
2 4
3 15
4 65
5 339
6 2103
7 15171
8 124755
9 1151331
10 11779971
11 132323811
12 1618766691
13 21421525731
14 304887173091
15 4644050174691
16 75378332568291
17 1298783923147491
18 23675771981669091
19 455240918799307491

[0,1,4,15,65,339,2103,15171,124755,1151331,
 11779971,132323811,1618766691,21421525731,
 304887173091,4644050174691,75378332568291,
 1298783923147491,23675771981669091,
 455240918799307491]

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 December 15 22:02 EST 2019. Contains 330012 sequences. (Running on oeis4.)