Numbers k such that in k and k^2 the parity of digits alternates.

Terms

a(0) =0a(1) =1a(2) =2a(3) =3a(4) =4a(5) =5a(6) =6a(7) =7a(8) =9a(9) =16a(10) =23a(11) =27a(12) =36a(13) =69a(14) =74a(15) =81a(16) =96a(17) =127a(18) =181a(19) =187a(20) =296a(21) =874a(22) =2327a(23) =2369a(24) =2723a(25) =2727a(26) =2763a(27) =3816a(28) =4589a(29) =5874