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A181198 as a simple table

na(n)
11
21
38
4169
56392
6352184
725097600
82152061145
9212012802584
1023263015359672
112781709560836960
12356806123331844056
1348516442013911012288
146930091952294051922080
151032505514388962439665280
16159544871422153344631037625
1725451354639006231998529405016

[1,1,8,169,6392,352184,25097600,2152061145,
 212012802584,23263015359672,2781709560836960,
 356806123331844056,48516442013911012288,
 6930091952294051922080,1032505514388962439665280,
 159544871422153344631037625,
 25451354639006231998529405016]