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A146541 as a simple table

na(n)
01
18
216
332
464
5128
6256
7512
81024
92048
104096
118192
1216384
1332768
1465536
15131072
16262144
17524288
181048576
192097152
204194304
218388608
2216777216
2333554432
2467108864
25134217728
26268435456
27536870912
281073741824
292147483648
304294967296
318589934592

[1,8,16,32,64,128,256,512,1024,2048,4096,8192,
 16384,32768,65536,131072,262144,524288,1048576,
 2097152,4194304,8388608,16777216,33554432,
 67108864,134217728,268435456,536870912,1073741824,
 2147483648,4294967296,8589934592]