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!)

A009394 as a simple table

n a(n)
0 0
1 1
2 -1
3 -3
4 14
5 -35
6 -16
7 1057
8 -10256
9 59865
10 -7936
11 -5446683
12 85543424
13 -726781835
14 -22368256
15 133713611977
16 -2849981597696
17 32440474082865
18 -209865342976
19 -10034804733270963
20 271127940241424384
21 -3854719922524818035

[0,1,-1,-3,14,-35,-16,1057,-10256,59865,-7936,
 -5446683,85543424,-726781835,-22368256,
 133713611977,-2849981597696,32440474082865,
 -209865342976,-10034804733270963,
 271127940241424384,-3854719922524818035]

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 3 15:45 EST 2021. Contains 349463 sequences. (Running on oeis4.)