login

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”).

A165748 as a simple table

na(n)
01
18
2-48
3400
4-3184
525488
6-203888
71631120
8-13048944
9104391568
10-835132528
116681060240
12-53448481904
13427587855248
14-3420702841968
1527365622735760
16-218924981886064
171751399855088528
18-14011198840708208

[1,8,-48,400,-3184,25488,-203888,1631120,
 -13048944,104391568,-835132528,6681060240,
 -53448481904,427587855248,-3420702841968,
 27365622735760,-218924981886064,1751399855088528,
 -14011198840708208]