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A138128 as a simple table

na(n)
01
1127
216129
32048383
4260144641
533038369407
64195872914689
7532875860165503
867675234241018881
98594754748609397887
101091533853073393531649
11138624799340320978519423

[1,127,16129,2048383,260144641,33038369407,
 4195872914689,532875860165503,67675234241018881,
 8594754748609397887,1091533853073393531649,
 138624799340320978519423]