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A101901 as a simple table

na(n)
01
12
24
310
430
5110
6484
72514
815142
9104126
10806772
116965090
1266374766
13692629618
147860173564
1596428710490
161272217776422
1717968286438066
18270569090589308
194328163151246858
2073311692500174358
211311041890981700358

[1,2,4,10,30,110,484,2514,15142,104126,806772,
 6965090,66374766,692629618,7860173564,96428710490,
 1272217776422,17968286438066,270569090589308,
 4328163151246858,73311692500174358,
 1311041890981700358]