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A221666 as a simple table

na(n)
12
22
34
48
512
68
716
864
948
1016
1124
12256
13512
14256
1532
1664
17992
183772
193772
20856
2164
22128
234096
2431744
2563200
2632768
274096
28128
29232
3016384
31262144
321048576
331048576
34262144
3515872
36256
37512
3865344
392097152
4016777216
4133421056
4216777216
432097152
4465344

[2,2,4,8,12,8,16,64,48,16,24,256,512,256,32,64,
 992,3772,3772,856,64,128,4096,31744,63200,32768,
 4096,128,232,16384,262144,1048576,1048576,262144,
 15872,256,512,65344,2097152,16777216,33421056,
 16777216,2097152,65344]