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A197653 as a simple table

na(n)
01
14
21
315
430
51
640
7324
8120
91
1085
112080
123120
13340
141
15156
169375
1740000
1818750
19780
201
21259
2232886
23328125
24437500
2582215
261554
271
28400
2996040
301959216
316002500
323265360
33288120
342800
351

[1,4,1,15,30,1,40,324,120,1,85,2080,3120,340,1,
 156,9375,40000,18750,780,1,259,32886,328125,
 437500,82215,1554,1,400,96040,1959216,6002500,
 3265360,288120,2800,1]