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A016906 as a simple table

na(n)
01048576
13486784401
2289254654976
36131066257801
463403380965376
5420707233300201
62064377754059776
78140406085191601
827197360938418176
979792266297612001
10210832519264920576
11511116753300641401

[1048576,3486784401,289254654976,6131066257801,
 63403380965376,420707233300201,2064377754059776,
 8140406085191601,27197360938418176,
 79792266297612001,210832519264920576,
 511116753300641401]