login
This site is supported by donations to The OEIS Foundation.

 

Logo

Please make a donation to keep the OEIS running. We are now in our 55th year. In the past year we added 12000 new sequences and reached 8000 citations (which often say "discovered thanks to the OEIS"). We need to raise money to hire someone to manage submissions, which would reduce the load on our editors and speed up editing.
Other ways to donate

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

A306524 as a simple table

n a(n)
0 0
1 0
2 0
3 3
4 15
5 86
6 544
7 3934
8 32079
9 292509
10 2952702
11 32712087
12 394749367
13 5155010088
14 72440184064
15 1090017765544
16 17486996858151
17 297965879586295
18 5374189975316350
19 102290550351854445
20 2049025241258716927
21 43089888746430771294
22 949172134240270646352

[0,0,0,3,15,86,544,3934,32079,292509,2952702,
 32712087,394749367,5155010088,72440184064,
 1090017765544,17486996858151,297965879586295,
 5374189975316350,102290550351854445,
 2049025241258716927,43089888746430771294,
 949172134240270646352]

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 7 05:14 EST 2019. Contains 329839 sequences. (Running on oeis4.)