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A221137 as a simple table

na(n)
116
29801
33485689
41539699121
5619901126244
6259039174953636
7106295637843093924
843910419047705413284

[16,9801,3485689,1539699121,619901126244,
 259039174953636,106295637843093924,
 43910419047705413284]