Numbers n not divisible by 2 such that n^2 written in base 4 has no digit > 1.

Terms

a(0) =1a(1) =9a(2) =33a(3) =129a(4) =513a(5) =1175a(6) =2049a(7) =4617a(8) =8193a(9) =18441a(10) =18807a(11) =32769a(12) =73737a(13) =131073a(14) =264321a(15) =270369a(16) =294921a(17) =524289a(18) =545431a(19) =1081377a(20) =1179657a(21) =2097153a(22) =4203009a(23) =4325409a(24) =4718601a(25) =8388609a(26) =16810497a(27) =16908417a(28) =17301537a(29) =18874377