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A330283 as a simple table

na(n)
10
20
30
40
50
60
70
86
913
1057
11141
12465
131224
143956
1511599
1636538
17107415
18327250
19972040
202957488
218879327
2226943317

[0,0,0,0,0,0,0,6,13,57,141,465,1224,3956,11599,
 36538,107415,327250,972040,2957488,8879327,
 26943317]