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A370227 as a simple table

na(n)
10
20
30
40
50
60
71
83
99
1025
1169
12201
13620
141923
156339
1622238
1782443
18333723
191490051
207241421

[0,0,0,0,0,0,1,3,9,25,69,201,620,1923,6339,22238,
 82443,333723,1490051,7241421]