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A207776 as a simple table

na(n)
121
2441
3972
47164
543264
6195160
71246206
87381202
935627804
10220514498
111274712127
126417933773
1338976638418
14221650017452
151149943284883
166878942092623
1738712906007620
18205352839927648
191212860472464769

[21,441,972,7164,43264,195160,1246206,7381202,
 35627804,220514498,1274712127,6417933773,
 38976638418,221650017452,1149943284883,
 6878942092623,38712906007620,205352839927648,
 1212860472464769]