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A333731 as a simple table

na(n)
10
20
30
40
51
61
74
841
91981
10304496
1178322916
1227033154065
1311934777413049
146593485023089912
154485517185017734885
163707462300996644966161
173680029088808704302571244
184341813441626431900011624077
196033239205199253768404631967656
209792722283774379198364367866020815

[0,0,0,0,1,1,4,41,1981,304496,78322916,
 27033154065,11934777413049,6593485023089912,
 4485517185017734885,3707462300996644966161,
 3680029088808704302571244,
 4341813441626431900011624077,
 6033239205199253768404631967656,
 9792722283774379198364367866020815]