A013272 - 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

A013272 as a simple table

n	a(n)
0	0
1	0
2	-1
3	3
4	-6
5	15
6	-150
7	1575
8	-12600
9	101115
10	-1096200
11	14293125
12	-185862600
13	2507429925
14	-38410772400
15	647097325875
16	-11267340084000
17	205801851630375
18	-4076456247864000
19	86033963719328625

[0,0,-1,3,-6,15,-150,1575,-12600,101115,-1096200, 14293125,-185862600,2507429925,-38410772400, 647097325875,-11267340084000,205801851630375, -4076456247864000,86033963719328625]