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A122513 as a simple table

na(n)
10
21
346
4135
54540
613261
7444906
81299475
943596280
10127335321
114271990566
1212477562015
13418611479220
141222673742181
1541019652973026
16119809549171755
174019507379877360
1811740113145089841
19393870703575008286
201150411278669632695
2138595309442970934700

[0,1,46,135,4540,13261,444906,1299475,43596280,
 127335321,4271990566,12477562015,418611479220,
 1222673742181,41019652973026,119809549171755,
 4019507379877360,11740113145089841,
 393870703575008286,1150411278669632695,
 38595309442970934700]