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A038255 as a simple table

na(n)
01
16
21
336
412
51
6216
7108
818
91
101296
11864
12216
1324
141
157776
166480
172160
18360
1930
201
2146656
2246656
2319440
244320
25540
2636
271
28279936
29326592
30163296
3145360
327560
33756
3442
351
361679616
372239488
381306368
39435456
4090720
4112096
421008

[1,6,1,36,12,1,216,108,18,1,1296,864,216,24,1,
 7776,6480,2160,360,30,1,46656,46656,19440,4320,
 540,36,1,279936,326592,163296,45360,7560,756,42,1,
 1679616,2239488,1306368,435456,90720,12096,1008]