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A157195 as a simple table

na(n)
10
20
30
42
50
66
70
88
93
1010
110
12144
130
1414
1515
1664
170
18324
190
20400
2121
2222
230
2413824
255
2626
2727
28784
290
3027000
310
321024
3333
3434
3535
36279936
370
3838
3939
4064000
410
4274088
430
441936
452025
4646
470
485308416
497
502500
5151
522704
530
54157464
5555
56175616
5757
5858
590
60777600000

[0,0,0,2,0,6,0,8,3,10,0,144,0,14,15,64,0,324,0,
 400,21,22,0,13824,5,26,27,784,0,27000,0,1024,33,
 34,35,279936,0,38,39,64000,0,74088,0,1936,2025,46,
 0,5308416,7,2500,51,2704,0,157464,55,175616,57,58,
 0,777600000]