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A366117 as a simple table

na(n)
01
12
25
313
433
577
6147
7128
8-726
9-5870
10-28918
11-117501
12-419748
13-1330265
14-3631065
15-7585458
16-5021553
1762555365
18485450778
192473377984
2010459876208
2138765746168
22126610935508
23352046019398
24725506704096
25264040020875
26-7980075940060
27-58806846330257

[1,2,5,13,33,77,147,128,-726,-5870,-28918,-117501,
 -419748,-1330265,-3631065,-7585458,-5021553,
 62555365,485450778,2473377984,10459876208,
 38765746168,126610935508,352046019398,
 725506704096,264040020875,-7980075940060,
 -58806846330257]