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!)

A191755 as a simple table

n a(n)
0 1
1 2
2 6
3 22
4 82
5 320
6 1268
7 5102
8 20632
9 83972
10 342468
11 1399296
12 5720966
13 23396618
14 95654386
15 390868900
16 1596000418
17 6511211718
18 26538617050
19 108060466284

[1,2,6,22,82,320,1268,5102,20632,83972,342468,
 1399296,5720966,23396618,95654386,390868900,
 1596000418,6511211718,26538617050,108060466284]

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 8 09:32 EST 2019. Contains 329862 sequences. (Running on oeis4.)