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A220760 as a simple table

na(n)
1236
215724
32715804
4252705768
530118695378
63442732323766
7390885525849628
844672658134562232
95096442065865772706
10581473363549735322116
1166354356746681426011986
127571457447988696073877188

[236,15724,2715804,252705768,30118695378,
 3442732323766,390885525849628,44672658134562232,
 5096442065865772706,581473363549735322116,
 66354356746681426011986,7571457447988696073877188]