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A009315 as a simple table

na(n)
00
11
20
34
4-15
5108
6-875
78517
8-95900
91228777
10-17659660
11281423800
12-4926084031
1393966286048
14-1940264385995
1543119269420549
16-1026217122711680
1726041836268699721
18-701939296463506432
1920028165890726106852

[0,1,0,4,-15,108,-875,8517,-95900,1228777,
 -17659660,281423800,-4926084031,93966286048,
 -1940264385995,43119269420549,-1026217122711680,
 26041836268699721,-701939296463506432,
 20028165890726106852]