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!)

A090021 as a simple table

n a(n)
0 0
1 1
2 21
3 175
4 1185
5 7471
6 45801
7 277495
8 1672545
9 10056991
10 60405081
11 362615815
12 2176242705
13 13059083311
14 78359348361
15 470170570135
16 2821066729665
17 16926530042431
18 101559568723641
19 609358576700455
20 3656154951181425

[0,1,21,175,1185,7471,45801,277495,1672545,
 10056991,60405081,362615815,2176242705,
 13059083311,78359348361,470170570135,
 2821066729665,16926530042431,101559568723641,
 609358576700455,3656154951181425]

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 July 29 07:28 EDT 2021. Contains 346340 sequences. (Running on oeis4.)