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A220941 as a simple table

na(n)
14
22056
3291080
443253705
56388528170
6944223520057
7139549646254609
820624731224928936
93048237966941788465
10450515041275014945368
1166583978433834919848004
129840795003881912664407189

[4,2056,291080,43253705,6388528170,944223520057,
 139549646254609,20624731224928936,
 3048237966941788465,450515041275014945368,
 66583978433834919848004,9840795003881912664407189]