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A219298 as a simple table

na(n)
128
2165
36647
4204842
55595137
6132409292
72898775988
861440315340
91268571836942
1025181695745066
11476652751338079
128610780294241502
13149111690333129713
142485299355179037240
1539992792294223348706

[28,165,6647,204842,5595137,132409292,2898775988,
 61440315340,1268571836942,25181695745066,
 476652751338079,8610780294241502,
 149111690333129713,2485299355179037240,
 39992792294223348706]