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A168519 as a simple table

na(n)
121
244
3323
4785
52620
64925
710184
813848
919697
1019302
1119040
1213450
139269
144538
152174
16633
17231
1844
193
200
210

[21,44,323,785,2620,4925,10184,13848,19697,19302,
 19040,13450,9269,4538,2174,633,231,44,3,0,0]