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A189694 as a simple table

na(n)
1128
216384
3371641
49205575
5151788273
62748122586
743645304766
8733660344149
911722251157012
10192737455311869
113101316117820858
1250582965637175513
13817179337255729430
1413284346442987716235
15215031581266863776172

[128,16384,371641,9205575,151788273,2748122586,
 43645304766,733660344149,11722251157012,
 192737455311869,3101316117820858,
 50582965637175513,817179337255729430,
 13284346442987716235,215031581266863776172]