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A027306 as a simple table

na(n)
01
11
23
34
411
516
642
764
8163
9256
10638
111024
122510
134096
149908
1516384
1639203
1765536
18155382
19262144
20616666
211048576
222449868
234194304
249740686
2516777216
2638754732
2767108864
28154276028
29268435456
30614429672
311073741824
322448023843

[1,1,3,4,11,16,42,64,163,256,638,1024,2510,4096,
 9908,16384,39203,65536,155382,262144,616666,
 1048576,2449868,4194304,9740686,16777216,38754732,
 67108864,154276028,268435456,614429672,1073741824,
 2448023843]