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A056890 as a simple table

na(n)
01
1-1
20
3-1
4-2
51
61
70
81
9-1
10-4
113
1214
13-11
14-63
1552
16353
17-301
18-2356
192055
2018194
21-16139
22-159335
23143196
241559017
25-1415821
26-16846656
2715430835
28199185034
29-183754199
30-2557127951
312373373752
3235416852081
33-33043478329
34-526322279512
35493278801183
368352696141782

[1,-1,0,-1,-2,1,1,0,1,-1,-4,3,14,-11,-63,52,353,
 -301,-2356,2055,18194,-16139,-159335,143196,
 1559017,-1415821,-16846656,15430835,199185034,
 -183754199,-2557127951,2373373752,35416852081,
 -33043478329,-526322279512,493278801183,
 8352696141782]