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A001403 as a simple table

na(n)
10
20
30
40
50
60
71
81
93
1010
1131
12229
132036
1421399
15245342
163004881
1738904499
18530452205
197640941062

[0,0,0,0,0,0,1,1,3,10,31,229,2036,21399,245342,
 3004881,38904499,530452205,7640941062]