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A028223 as a simple table

na(n)
01
137
2863
316241
4269703
54129041
659748151
7829986817
811183795975
9147236359985
101903757010519
1124269169222753
12305923748441767
133821741982426769
1447397910610955767
15584393237595955649

[1,37,863,16241,269703,4129041,59748151,829986817,
 11183795975,147236359985,1903757010519,
 24269169222753,305923748441767,3821741982426769,
 47397910610955767,584393237595955649]