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A115034 as a simple table

na(n)
11
22
32
41
52
62
74
82
98
104
1132
128
13256
1432
158192
16256
172097152
188192
1917179869184
202097152
2136028797018963968
2217179869184
23618970019642690137449562112
2436028797018963968

[1,2,2,1,2,2,4,2,8,4,32,8,256,32,8192,256,2097152,
 8192,17179869184,2097152,36028797018963968,
 17179869184,618970019642690137449562112,
 36028797018963968]