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A266129 as a simple table

na(n)
116
2625
31959
444623
51285961
613689944
7311260836
86688962679
9100184677192
102265417750456
1145483452144968
12770435712461338
1316815081540198455
14333162387132057777
155991913305292420418
16126615975061832318833

[16,625,1959,44623,1285961,13689944,311260836,
 6688962679,100184677192,2265417750456,
 45483452144968,770435712461338,16815081540198455,
 333162387132057777,5991913305292420418,
 126615975061832318833]