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A320392 as a simple table

na(n)
01
11
20
30
44
54
610
724
8252
9410
101998
117798
1265188
13280582
142281108
1510585748
16110903088

[1,1,0,0,4,4,10,24,252,410,1998,7798,65188,280582,
 2281108,10585748,110903088]