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A359519 as a simple table

na(n)
10
20
30
40
50
60
70
81
92
1016
1170
12378
131772
148456
1538623
16174400
17771944
183378937

[0,0,0,0,0,0,0,1,2,16,70,378,1772,8456,38623,
 174400,771944,3378937]