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A220254 as a simple table

na(n)
12
22
32
48
516
68
716
848
948
1016
1124
12256
13324
14256
1524
1664
17928
184096
194096
20928
2164
22128
234096
2431744
2545792
2631744
274096
28128
29232
3015872
31262144
321048576
331048576
34262144
3515872
36232
37512
3865536
392011776
4016777216
4133350528
4216777216
432011776
4465536

[2,2,2,8,16,8,16,48,48,16,24,256,324,256,24,64,
 928,4096,4096,928,64,128,4096,31744,45792,31744,
 4096,128,232,15872,262144,1048576,1048576,262144,
 15872,232,512,65536,2011776,16777216,33350528,
 16777216,2011776,65536]