Numbers A such that the square of concatenation AA is of form NNMM.

Terms

a(0) =8a(1) =89a(2) =98a(3) =406a(4) =593a(5) =998a(6) =4445a(7) =4544a(8) =5455a(9) =5554a(10) =9899a(11) =9998a(12) =34687a(13) =44443a(14) =55556a(15) =65312a(16) =90242a(17) =99998a(18) =219374a(19) =285713a(20) =286714a(21) =296297a(22) =297296a(23) =340066a(24) =362636a(25) =363637a(26) =374219a(27) =416989a(28) =583010a(29) =625780