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A038504 as a simple table

na(n)
00
11
22
33
44
56
612
728
864
9136
10272
11528
121024
132016
144032
158128
1616384
1732896
1865792
19131328
20262144
21523776
221047552
232096128
244194304
258390656
2616781312
2733558528
2867108864
29134209536
30268419072
31536854528
321073741824

[0,1,2,3,4,6,12,28,64,136,272,528,1024,2016,4032,
 8128,16384,32896,65792,131328,262144,523776,
 1047552,2096128,4194304,8390656,16781312,33558528,
 67108864,134209536,268419072,536854528,1073741824]