Nonsquarefree numbers obtained by repeating a single digit.

Terms

a(0) =4a(1) =8a(2) =9a(3) =44a(4) =88a(5) =99a(6) =333a(7) =444a(8) =666a(9) =888a(10) =999a(11) =4444a(12) =8888a(13) =9999a(14) =44444a(15) =88888a(16) =99999a(17) =333333a(18) =444444a(19) =666666a(20) =777777a(21) =888888a(22) =999999a(23) =4444444a(24) =8888888a(25) =9999999a(26) =44444444a(27) =88888888a(28) =99999999a(29) =111111111