login
The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

 

Logo

Please make a donation to keep the OEIS running. We are now in our 56th year. In the past year we added 10000 new sequences and reached almost 9000 citations (which often say "discovered thanks to the OEIS").
Other ways to donate

Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)

A197213 as a simple table

n a(n)
1 1
2 8
3 44
4 221
5 1175
6 5982
7 30940
8 160438
9 828709
10 4285218
11 22165292
12 114628225
13 592784354
14 3065621155
15 15854191220
16 81990622115
17 424018125103
18 2192835511699
19 11340373874625
20 58647355280660
21 303298041583255
22 1568522750375630

[1,8,44,221,1175,5982,30940,160438,828709,4285218,
 22165292,114628225,592784354,3065621155,
 15854191220,81990622115,424018125103,
 2192835511699,11340373874625,58647355280660,
 303298041583255,1568522750375630]

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 4 00:33 EST 2020. Contains 338920 sequences. (Running on oeis4.)