Number of asymmetric orthoplex n-ominoes in n-2 space.

Terms

a(0) =0a(1) =0a(2) =2a(3) =10a(4) =33a(5) =101a(6) =277a(7) =754a(8) =1972a(9) =5134a(10) =13145a(11) =33563a(12) =85048a(13) =215075a(14) =541887a(15) =1363376a(16) =3423537a(17) =8588521a(18) =21522243a(19) =53898911a(20) =134895022a(21) =337467395a(22) =843924068a(23) =2109897826a(24) =5273789335a(25) =13180026621a(26) =32934865984