A172549 - 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

A172549 as a simple table

n	a(n)
1	0
2	0
3	0
4	1
5	113400
6	154700988750
7	617944896216648000
8	6637298299496411164868250
9	176264656064665625137392456544800
10	10697695830125272790880922760946584535000

[0,0,0,1,113400,154700988750,617944896216648000, 6637298299496411164868250, 176264656064665625137392456544800, 10697695830125272790880922760946584535000]