Even numbers k such that in k^2 the parity of digits alternates.

Terms

a(0) =0a(1) =2a(2) =4a(3) =6a(4) =16a(5) =26a(6) =36a(7) =74a(8) =84a(9) =96a(10) =204a(11) =264a(12) =296a(13) =384a(14) =404a(15) =426a(16) =574a(17) =584a(18) =606a(19) =726a(20) =736a(21) =764a(22) =874a(23) =884a(24) =964a(25) =1464a(26) =1584a(27) =1596a(28) =1704a(29) =2036