Numbers that can be written as (a^2-1)(b^2-1) in three or more distinct ways.

Terms

a(0) =2880a(1) =27720a(2) =40320a(3) =49920a(4) =63360a(5) =98280a(6) =241920a(7) =282744a(8) =491400a(9) =547200a(10) =604800a(11) =950400a(12) =970200a(13) =1048320a(14) =1370880a(15) =1614600a(16) =1774080a(17) =2489760a(18) =2608320a(19) =2882880a(20) =2923200a(21) =3931200a(22) =4817400a(23) =6126120a(24) =7338240a(25) =7673400a(26) =8426880a(27) =10200960