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A016724 as a simple table

na(n)
02
12
25
34
49
56
615
78
825
910
1043
1112
1277
1314
14143
1516
16273
1718
18531
1920
201045
2122
222071
2324
244121
2526
268219
2728
2816413
2930
3032799
3132
3265569
3334
34131107
3536
36262181
3738
38524327
3940
401048617
4142
422097195
4344

[2,2,5,4,9,6,15,8,25,10,43,12,77,14,143,16,273,18,
 531,20,1045,22,2071,24,4121,26,8219,28,16413,30,
 32799,32,65569,34,131107,36,262181,38,524327,40,
 1048617,42,2097195,44]