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A135569 as a simple table

na(n)
00
12
24
316
416
564
6128
7384
8256
91024
102048
116144
128192
1324576
1449152
15131072
1665536
17262144
18524288
191572864
202097152
216291456
2212582912
2333554432
2433554432
25100663296
26201326592
27536870912
28805306368
292147483648
304294967296

[0,2,4,16,16,64,128,384,256,1024,2048,6144,8192,
 24576,49152,131072,65536,262144,524288,1572864,
 2097152,6291456,12582912,33554432,33554432,
 100663296,201326592,536870912,805306368,
 2147483648,4294967296]