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A012283 as a simple table

na(n)
00
10
22
3-3
44
5-20
6-130
71869
8-12280
9100080
10-362822
11-7482475
12168953420
13-2715677172
1434715587062
15-205932278475
16-3285394779888
17157209810212416
18-4031590864355982
1971565905502128781

[0,0,2,-3,4,-20,-130,1869,-12280,100080,-362822,
 -7482475,168953420,-2715677172,34715587062,
 -205932278475,-3285394779888,157209810212416,
 -4031590864355982,71565905502128781]