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A110822 as a simple table

na(n)
01
115
2-112
31680
4-31472
5660240
6-14839664
7349414800
8-8507710960
9212459830800
10-5411770287728
11140059532123280
12-3672503890520304
1397354865146790160
14-2604834063375041904
1570252635819008699280
16-1907877108652806790128
1752128195213064060918800
18-1431935470768717669608560

[1,15,-112,1680,-31472,660240,-14839664,349414800,
 -8507710960,212459830800,-5411770287728,
 140059532123280,-3672503890520304,
 97354865146790160,-2604834063375041904,
 70252635819008699280,-1907877108652806790128,
 52128195213064060918800,
 -1431935470768717669608560]