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A197655 as a simple table

na(n)
01
16
21
363
4126
51
6364
74374
81092
91
101365
1185120
12127680
135460
141
153906
16984375
176000000
181968750
1919530
201
219331
227562646
23157828125
24210437500
2518906615
2655986
271
2819608
2942824236
302628749256
3111029593750
324381248760
33128472708
34137256
351

[1,6,1,63,126,1,364,4374,1092,1,1365,85120,127680,
 5460,1,3906,984375,6000000,1968750,19530,1,9331,
 7562646,157828125,210437500,18906615,55986,1,
 19608,42824236,2628749256,11029593750,4381248760,
 128472708,137256,1]