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A321546 as a simple table

na(n)
11
2-127
32188
4-16511
578126
6-277876
7823544
8-2113663
94785157
10-9922002
1119487172
12-36126068
1362748518
14-104590088
15170939688
16-270549119
17410338674
18-607714939
19893871740
20-1289938386
211801914272
22-2474870844
233404825448
24-4624694644
256103593751
26-7969061786
2710465138360
28-13597534984
2917249876310

[1,-127,2188,-16511,78126,-277876,823544,-2113663,
 4785157,-9922002,19487172,-36126068,62748518,
 -104590088,170939688,-270549119,410338674,
 -607714939,893871740,-1289938386,1801914272,
 -2474870844,3404825448,-4624694644,6103593751,
 -7969061786,10465138360,-13597534984,17249876310]