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A111794 as a simple table

na(n)
11
22
33
44
55
67
78
816
911
1017
1119
1232
1353
14128
15256
1665536
1731
1859
1967
20131
21241
22719
231619
242048
25131072
26524288
27821641
284294967296
299007199254740992

[1,2,3,4,5,7,8,16,11,17,19,32,53,128,256,65536,31,
 59,67,131,241,719,1619,2048,131072,524288,821641,
 4294967296,9007199254740992]