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A216037 as a simple table

na(n)
20
30
40
50
60
70
80
90
100
110
120
130
140
152
166
177
1828
1935
20136
21168
22978
231276
2412720

[0,0,0,0,0,0,0,0,0,0,0,0,0,2,6,7,28,35,136,168,
 978,1276,12720]