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A296622 as a simple table

na(n)
00
12
2-12
3328
4-15008
51356192
6-166628352
731500831360
8-7474571071488
92418220114014720
10-940432709166170112
11464609611973533501440
12-268355615175956213268480
13188067307050238642631516160
14-151072053399934628129585233920
15142618740583722182161589570273280

[0,2,-12,328,-15008,1356192,-166628352,
 31500831360,-7474571071488,2418220114014720,
 -940432709166170112,464609611973533501440,
 -268355615175956213268480,
 188067307050238642631516160,
 -151072053399934628129585233920,
 142618740583722182161589570273280]