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A185420 as a simple table

na(n)
11
24
31
420
55
61
7128
832
96
101
111024
12256
1346
147
151
169856
172464
18432
1962
208
211
22110720
2327680
244784
25662
2680
279
281
291421312
30355328
3160864
328224
33952
34100
3510
361
3720525056
385131264
39873664
40116128
4113048
421308
43122
4411
451

[1,4,1,20,5,1,128,32,6,1,1024,256,46,7,1,9856,
 2464,432,62,8,1,110720,27680,4784,662,80,9,1,
 1421312,355328,60864,8224,952,100,10,1,20525056,
 5131264,873664,116128,13048,1308,122,11,1]