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A221798 as a simple table

na(n)
10
2112
3470
426770
5291016
68348792
7128392912
82902283642
951249757660
101057112321675
1119743642679950
12392701939735569
137503512799161496
14147078276950393993
152836406566579942784
1655269364154475476649

[0,112,470,26770,291016,8348792,128392912,
 2902283642,51249757660,1057112321675,
 19743642679950,392701939735569,7503512799161496,
 147078276950393993,2836406566579942784,
 55269364154475476649]