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A078039 as a simple table

na(n)
01
1-2
24
3-9
419
5-41
688
7-189
8406
9-872
101873
11-4023
128641
13-18560
1439865
15-85626
16183916
17-395033
18848491
19-1822473
203914488
21-8407925
2218059374
23-38789712
2483316385
25-178955183
26384377665
27-825604416
281773314929
29-3808901426
308181135700
31-17572253481
3237743426307
33-81069068969

[1,-2,4,-9,19,-41,88,-189,406,-872,1873,-4023,
 8641,-18560,39865,-85626,183916,-395033,848491,
 -1822473,3914488,-8407925,18059374,-38789712,
 83316385,-178955183,384377665,-825604416,
 1773314929,-3808901426,8181135700,-17572253481,
 37743426307,-81069068969]