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

 

Logo

Year-end appeal: Please make a donation to the OEIS Foundation to support ongoing development and maintenance of the OEIS. We are now in our 56th year, we are closing in on 350,000 sequences, and we’ve crossed 9,700 citations (which often say “discovered thanks to the OEIS”).

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

A318616 as a simple table

n a(n)
0 1
1 0
2 -4
3 -9
4 160
5 1350
6 -14904
7 -335160
8 1796096
9 125615448
10 204300000
11 -64591072920
12 -735003528192
13 41673388751280
14 1113912529707264
15 -30043364514345000
16 -1703374149711298560
17 17822402097051182400
18 2856178489894627203072
19 12394040043610922716800
20 -5255899207995216384000000

[1,0,-4,-9,160,1350,-14904,-335160,1796096,
 125615448,204300000,-64591072920,-735003528192,
 41673388751280,1113912529707264,
 -30043364514345000,-1703374149711298560,
 17822402097051182400,2856178489894627203072,
 12394040043610922716800,
 -5255899207995216384000000]

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 6 04:02 EST 2021. Contains 349562 sequences. (Running on oeis4.)