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A298607 as a simple table

na(n)
11024
22048
34096
4131072
51048576
62097152
74194304
88388608
967108864
10536870912
111073741824
12274877906944
131099511627776
142199023255552
154398046511104
168796093022208
1717592186044416
1835184372088832
1970368744177664
20140737488355328
21281474976710656
221125899906842624

[1024,2048,4096,131072,1048576,2097152,4194304,
 8388608,67108864,536870912,1073741824,
 274877906944,1099511627776,2199023255552,
 4398046511104,8796093022208,17592186044416,
 35184372088832,70368744177664,140737488355328,
 281474976710656,1125899906842624]