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A038019 as a simple table

na(n)
01
10
21
31
44
51
6969
71431
8729
9108
1056615456
1175491208
1237741600
138386560
14697501

[1,0,1,1,4,1,969,1431,729,108,56615456,75491208,
 37741600,8386560,697501]