A012440 - 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

A012440 as a simple table

n	a(n)
0	0
1	2
2	-4
3	398
4	-10344
5	2050362
6	-188329260
7	60987377670
8	-12776749381200
9	6138167322301170
10	-2341662552659308500
11	1574696831249089102590
12	-954442874464228447345080
13	862598218425468174866650410

[0,2,-4,398,-10344,2050362,-188329260,60987377670, -12776749381200,6138167322301170, -2341662552659308500,1574696831249089102590, -954442874464228447345080, 862598218425468174866650410]