k = a*b where ab is cyclic permutation of the digits of k.

Terms

a(0) =688a(1) =12762a(2) =25510a(3) =149364a(4) =263155a(5) =1181565a(6) =1677672a(7) =2266852a(8) =3410968a(9) =7992868a(10) =11253375a(11) =12374428a(12) =18227848a(13) =25050100a(14) =25108330a(15) =37466244a(16) =65726896a(17) =68587492a(18) =73658920a(19) =112129344a(20) =112822564a(21) =233965908a(22) =251434872a(23) =273026902a(24) =592687408a(25) =599873607a(26) =907593975