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A121904 as a simple table

na(n)
01
122
2504
311328
4254433
55714356
6128339632
72882400037
864736277048
91453922256329
1032653869265129
11733378399940296
1216471061151498380
13369926160190271626
148308229975861003525
15186595847388277259847
164190785566084546949287
1794121513992523815815369

[1,22,504,11328,254433,5714356,128339632,
 2882400037,64736277048,1453922256329,
 32653869265129,733378399940296,16471061151498380,
 369926160190271626,8308229975861003525,
 186595847388277259847,4190785566084546949287,
 94121513992523815815369]