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!)

A216490 as a simple table

n a(n)
0 1
1 1
2 2
3 6
4 21
5 78
6 302
7 1210
8 4979
9 20913
10 89284
11 386308
12 1690221
13 7465594
14 33243970
15 149080710
16 672682035
17 3051859515
18 13913105076
19 63704186436
20 292825392338
21 1350782681404
22 6251139672412
23 29014088205700
24 135029529235367
25 629978080093921
26 2945889534054758

[1,1,2,6,21,78,302,1210,4979,20913,89284,386308,
 1690221,7465594,33243970,149080710,672682035,
 3051859515,13913105076,63704186436,292825392338,
 1350782681404,6251139672412,29014088205700,
 135029529235367,629978080093921,2945889534054758]

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 May 2 17:35 EDT 2024. Contains 372203 sequences. (Running on oeis4.)