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A232481 as a simple table

na(n)
10
20
30
40
51
61
72
83
95
107
1111
1216
1323
1433
1546
1663
1787
18117
19157
20210

[0,0,0,0,1,1,2,3,5,7,11,16,23,33,46,63,87,117,157,
 210]