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A056887 as a simple table

na(n)
01
10
2-1
3-2
41
52
67
7-8
8-7
9-6
1027
11-54
1257
13-56
14-233
15-232
16-7
17-6
18187
19-588
201485
21-1242
22-6177
23-3184
24-639
25640
26-1441
27-3472
2813033
2913032
30-20745
31-24120
321593
331594
3420891
35-60476
369069
37-26964
38-1916541
39-6305202
401619109
41-1599426
42-8587701

[1,0,-1,-2,1,2,7,-8,-7,-6,27,-54,57,-56,-233,-232,
 -7,-6,187,-588,1485,-1242,-6177,-3184,-639,640,
 -1441,-3472,13033,13032,-20745,-24120,1593,1594,
 20891,-60476,9069,-26964,-1916541,-6305202,
 1619109,-1599426,-8587701]