Squares in which parity of digits alternates.

Terms

a(0) =0a(1) =1a(2) =4a(3) =9a(4) =16a(5) =25a(6) =36a(7) =49a(8) =81a(9) =121a(10) =169a(11) =256a(12) =361a(13) =529a(14) =676a(15) =729a(16) =961a(17) =1296a(18) =4761a(19) =5476a(20) =6561a(21) =7056a(22) =9216a(23) =12321a(24) =12769a(25) =14161a(26) =16129a(27) =18769a(28) =32761a(29) =34969