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A004734 as a simple table

na(n)
11
28
33
432
55
664
735
8512
963
101024
11231
124096
13429
148192
156435
16131072
1712155
18262144
1946189
201048576
2188179
222097152
23676039
2416777216
251300075
2633554432
275014575
28134217728
299694845
30268435456
31300540195

[1,8,3,32,5,64,35,512,63,1024,231,4096,429,8192,
 6435,131072,12155,262144,46189,1048576,88179,
 2097152,676039,16777216,1300075,33554432,5014575,
 134217728,9694845,268435456,300540195]