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A264412 as a simple table

na(n)
01
13
2-3
39
4-33
5126
6-513
72214
8-9876
945045
10-209493
11990198
12-4741191
1322946247
14-112079214
15551793303
16-2735330190
1713641353118
18-68394016548
19344539469889
20-1743035351958
218851923849123
22-45110440515753
23230615809867476
24-1182376529280117
256078184963674498
26-31322206517658453
27161774639164275552
28-837290923919381322

[1,3,-3,9,-33,126,-513,2214,-9876,45045,-209493,
 990198,-4741191,22946247,-112079214,551793303,
 -2735330190,13641353118,-68394016548,344539469889,
 -1743035351958,8851923849123,-45110440515753,
 230615809867476,-1182376529280117,
 6078184963674498,-31322206517658453,
 161774639164275552,-837290923919381322]