Odd n such that in n^2 the parity of digits alternates.

Terms

a(0) =1a(1) =3a(2) =5a(3) =7a(4) =9a(5) =11a(6) =13a(7) =19a(8) =23a(9) =27a(10) =31a(11) =69a(12) =81a(13) =111a(14) =113a(15) =119a(16) =127a(17) =137a(18) =181a(19) =187a(20) =237a(21) =269a(22) =273a(23) =277a(24) =281a(25) =311a(26) =461a(27) =463a(28) =539a(29) =661