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A275594 as a simple table

na(n)
11
21
31
41
52
66
724
8144
91464
1026808
11935184
1267404816
1310401844896
143508019017056
152732681228689152
165018025242941566336
1721914759744001662937984
18238559201308551667344338304
196565759935393013059564090526464

[1,1,1,1,2,6,24,144,1464,26808,935184,67404816,
 10401844896,3508019017056,2732681228689152,
 5018025242941566336,21914759744001662937984,
 238559201308551667344338304,
 6565759935393013059564090526464]