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A072552 as a simple table

na(n)
61
70
81
91
103
113
1213
1321
1468
15166
16543
171605
185413
1917735
2061084
21210221
22736287

[1,0,1,1,3,3,13,21,68,166,543,1605,5413,17735,
 61084,210221,736287]