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A370533 as a simple table

na(n)
11
20
3-15
480
5-255
6432
71020
8-12510
971595
10-354070
111570104
12-5622420
1313438045
14-4035840
15-135362385
16608528868
17-646486560
18-5733423180
1927001866935
2058064077890
21-1517240012304
2212354566895940
23-72313804557375
24336406302349200
25-1168330262135925
261853669275129548

[1,0,-15,80,-255,432,1020,-12510,71595,-354070,
 1570104,-5622420,13438045,-4035840,-135362385,
 608528868,-646486560,-5733423180,27001866935,
 58064077890,-1517240012304,12354566895940,
 -72313804557375,336406302349200,-1168330262135925,
 1853669275129548]