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A221033 as a simple table

na(n)
121
21710
3110506
46637755
5393788081
623287585899
71376083439034
881296621316610
94802591348249077
10283708464262466290
1116759739541027933054
12990060650898808032184
1358486579373224774257276
143455020389521403479154432

[21,1710,110506,6637755,393788081,23287585899,
 1376083439034,81296621316610,4802591348249077,
 283708464262466290,16759739541027933054,
 990060650898808032184,58486579373224774257276,
 3455020389521403479154432]