Maximal product of any two numbers whose concatenation is n.

Terms

a(0) =0a(1) =0a(2) =0a(3) =0a(4) =0a(5) =0a(6) =0a(7) =0a(8) =0a(9) =0a(10) =0a(11) =1a(12) =2a(13) =3a(14) =4a(15) =5a(16) =6a(17) =7a(18) =8a(19) =9a(20) =0a(21) =2a(22) =4a(23) =6a(24) =8a(25) =10a(26) =12a(27) =14a(28) =16a(29) =18