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A276180 as a simple table

na(n)
01
110
230
3-300
4-3850
5-13940
656300
7543400
8-2332250
9-29758500
10340835780
117316239000
1240381709500
13-199606565000
14-4494519345000
15-25429880846000
1618331676223750
17848074482677500
18714616060812500
19-19019302889325000
20506727569992188500

[1,10,30,-300,-3850,-13940,56300,543400,-2332250,
 -29758500,340835780,7316239000,40381709500,
 -199606565000,-4494519345000,-25429880846000,
 18331676223750,848074482677500,714616060812500,
 -19019302889325000,506727569992188500]