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!)

A217451 as a simple table

n a(n)
1 3
2 15
3 69
4 253
5 1049
6 4205
7 16887
8 68015
9 273471
10 1100135
11 4425449
12 17801365
13 71607677
14 288046417
15 1158686263
16 4660895899
17 18748771139
18 75418217399
19 303374944277
20 1220346484777
21 4908927310389
22 19746496259789
23 79431633434755

[3,15,69,253,1049,4205,16887,68015,273471,1100135,
 4425449,17801365,71607677,288046417,1158686263,
 4660895899,18748771139,75418217399,303374944277,
 1220346484777,4908927310389,19746496259789,
 79431633434755]

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 October 26 11:59 EDT 2021. Contains 348267 sequences. (Running on oeis4.)