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A060818 as a simple table

na(n)
01
11
22
32
48
58
616
716
8128
9128
10256
11256
121024
131024
142048
152048
1632768
1732768
1865536
1965536
20262144
21262144
22524288
23524288
244194304
254194304
268388608
278388608
2833554432
2933554432
3067108864
3167108864
322147483648
332147483648
344294967296

[1,1,2,2,8,8,16,16,128,128,256,256,1024,1024,2048,
 2048,32768,32768,65536,65536,262144,262144,524288,
 524288,4194304,4194304,8388608,8388608,33554432,
 33554432,67108864,67108864,2147483648,2147483648,
 4294967296]