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A222529 as a simple table

na(n)
01
11
2131071
31270865805301
4196740254364198919901
5236795997997922560392792426501
61454443713270449746545892977574122129433
734559048315358253352594346952765431711799794270765
82610516895723221966171633379256064857587637240616032299710417

[1,1,131071,1270865805301,196740254364198919901,
 236795997997922560392792426501,
 1454443713270449746545892977574122129433,
 34559048315358253352594346952765431711799794270765\
 ,
 26105168957232219661716333792560648575876372406160\
 32299710417]