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A079403 as a simple table

na(n)
23
36
413
527
654
7109
8219
9439
10879
111759
123518
137037
1414075
1528151
1656303
17112606
18225212
19450424
20900848
211801696
223603393

[3,6,13,27,54,109,219,439,879,1759,3518,7037,
 14075,28151,56303,112606,225212,450424,900848,
 1801696,3603393]