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A132694 as a simple table

na(n)
01
11
2-4
335
4-455
57735
6-161336
73973212
8-112587210
93603324835
10-128433778935
115042279130343
12-216113991649920
1310038333251577820
14-502213976534135280
1526920671954736535620
16-1539171664433009622090
1793492751831594011076131
18-6012423991038631627857900

[1,1,-4,35,-455,7735,-161336,3973212,-112587210,
 3603324835,-128433778935,5042279130343,
 -216113991649920,10038333251577820,
 -502213976534135280,26920671954736535620,
 -1539171664433009622090,93492751831594011076131,
 -6012423991038631627857900]