A009034 - OEIS

The OEIS is supported by the many generous donors to the OEIS Foundation.

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 61st year, we have over 378,000 sequences, and we’ve reached 11,000 citations (which often say “discovered thanks to the OEIS”).

Other ways to Give

A009034 as a simple table

n	a(n)
0	1
1	0
2	-1
3	9
4	-58
5	330
6	-1690
7	6580
8	5924
9	-626856
10	11483620
11	-169739812
12	2336104168
13	-31232156280
14	411116838184
15	-5322020904720
16	66716820030608
17	-776290733888320
18	7344102656963504
19	-19147581666874928

[1,0,-1,9,-58,330,-1690,6580,5924,-626856, 11483620,-169739812,2336104168,-31232156280, 411116838184,-5322020904720,66716820030608, -776290733888320,7344102656963504, -19147581666874928]