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A077933 as a simple table

na(n)
01
1-1
21
32
4-6
510
6-5
7-15
851
9-76
1036
11132
12-411
13595
14-235
15-1130
163326
17-4626
181471
199637
20-26841
2135880
22-8440
23-81720
24216201
25-277401
2640681
27689642
28-1738046
292137490
30-109245
31-5794535
3213945051
33-16410276
34-864084
3548493772
36-111669651
37125487675
3820857725
39-404360450

[1,-1,1,2,-6,10,-5,-15,51,-76,36,132,-411,595,
 -235,-1130,3326,-4626,1471,9637,-26841,35880,
 -8440,-81720,216201,-277401,40681,689642,-1738046,
 2137490,-109245,-5794535,13945051,-16410276,
 -864084,48493772,-111669651,125487675,20857725,
 -404360450]