Numbers k such that in 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) =11a(10) =13a(11) =16a(12) =19a(13) =23a(14) =26a(15) =27a(16) =31a(17) =36a(18) =69a(19) =74a(20) =81a(21) =84a(22) =96a(23) =111a(24) =113a(25) =119a(26) =127a(27) =137a(28) =181a(29) =187