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A360322 as a simple table

na(n)
01
12
2-4
310
4-30
5102
6-376
71462
8-5900
924470
10-103644
11446382
12-1948854
138605290
14-38362200
15172423770
16-780496110
173554991270
18-16281079900
1974927379550
20-346328465930
211607078948690
22-7483861047480
2334963419415650
24-163825013554400
25769694347677002

[1,2,-4,10,-30,102,-376,1462,-5900,24470,-103644,
 446382,-1948854,8605290,-38362200,172423770,
 -780496110,3554991270,-16281079900,74927379550,
 -346328465930,1607078948690,-7483861047480,
 34963419415650,-163825013554400,769694347677002]