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A139145 as a simple table

na(n)
11
21
32
41
52
64
76
81
92
104
116
1216
1320
1436
1542
161
172
184
196
2016
2120
2236
2342
24256
25272
26400
27420
281296
291332
301764
311806
321
332
344
356
3616
3720
3836
3942
40256
41272
42400
43420
441296
451332
461764
471806
4865536
4965792
5073984
5174256
52160000
53160400
54176400
55176820
561679616

[1,1,2,1,2,4,6,1,2,4,6,16,20,36,42,1,2,4,6,16,20,
 36,42,256,272,400,420,1296,1332,1764,1806,1,2,4,6,
 16,20,36,42,256,272,400,420,1296,1332,1764,1806,
 65536,65792,73984,74256,160000,160400,176400,
 176820,1679616]