Sum of all n-digit Apery numbers.

Terms

a(0) =2a(1) =24a(2) =180a(3) =7420a(4) =33264a(5) =991848a(6) =3938220a(7) =103832872a(8) =389398464a(9) =9620555000a(10) =34901442000a(11) =828288777420