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A170995 as a simple table

na(n)
22
3118096
4120815280
519896619840
61139754451080
732740753325472
8577763760958720
97092667383039360
1065742150901548780
11487018342594703600
123004685799388645312
1315919220244209484096

[2,118096,120815280,19896619840,1139754451080,
 32740753325472,577763760958720,7092667383039360,
 65742150901548780,487018342594703600,
 3004685799388645312,15919220244209484096]