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!)

A006424 as a simple table

n a(n)
1 20
2 831
3 12656
4 109075
5 648792
6 2978245
7 11293436
8 36973989
9 107727724
10 285451894
11 699013380
12 1601397330
13 3465135024
14 7135903782
15 14072047976
16 26707904230
17 48991682628
18 87164772761
19 150869282184
20 254695011933
21 420306632200
22 679327313795
23 1077197343300
24 1678276223715

[20,831,12656,109075,648792,2978245,11293436,
 36973989,107727724,285451894,699013380,1601397330,
 3465135024,7135903782,14072047976,26707904230,
 48991682628,87164772761,150869282184,254695011933,
 420306632200,679327313795,1077197343300,
 1678276223715]

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 23 22:36 EDT 2024. Contains 371917 sequences. (Running on oeis4.)