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A189415 as a simple table

na(n)
10
21
350
4490
52618
69519
728432
870796
9157912
10321161
11610482
121082570
131848362
143003015
154716792
167204604
1710730528
1815530189
1922093410
2030723078
2142146178
2256981411
2375952240
2499685104
25129757248

[0,1,50,490,2618,9519,28432,70796,157912,321161,
 610482,1082570,1848362,3003015,4716792,7204604,
 10730528,15530189,22093410,30723078,42146178,
 56981411,75952240,99685104,129757248]