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A337894 as a simple table

na(n)
21
32
41
53
621
71
84
9201
1093024
111
125
131076
14294157089
15199556208371776
161
176
184025
1991983927296
201370366433970979158839987
21346179533768149850758531729588224
221

[1,2,1,3,21,1,4,201,93024,1,5,1076,294157089,
 199556208371776,1,6,4025,91983927296,
 1370366433970979158839987,
 346179533768149850758531729588224,1]