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A162132 as a simple table

na(n)
18
2252
345864
450262534
5351601076232
616367322300597324
75217637682319138197604
811629272273607529252594370117
9184105746720318540273712504363740024

[8,252,45864,50262534,351601076232,
 16367322300597324,5217637682319138197604,
 11629272273607529252594370117,
 184105746720318540273712504363740024]