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A166156 as a simple table

na(n)
11
22
34
48
516
620
732
864
9112
10128
11256
12512
131024
142048
152816
164096
178192
1813312
1916384
2032768
2165536
22131072
23262144
24278528
25524288
261000512
271048576
281245184
292097152
304194304
318388608
3216777216
3324117248
3433554432
3567108864

[1,2,4,8,16,20,32,64,112,128,256,512,1024,2048,
 2816,4096,8192,13312,16384,32768,65536,131072,
 262144,278528,524288,1000512,1048576,1245184,
 2097152,4194304,8388608,16777216,24117248,
 33554432,67108864]