Numbers n such that the decimal number concat(9,n) is a square.

Terms

a(0) =61a(1) =216a(2) =409a(3) =604a(4) =801a(5) =1204a(6) =1809a(7) =2416a(8) =3025a(9) =3636a(10) =4249a(11) =4864a(12) =5481a(13) =6100a(14) =6721a(15) =7344a(16) =7969a(17) =8596a(18) =9225a(19) =9856a(20) =10116a(21) =12025a(22) =13936a(23) =15849a(24) =17764a(25) =19681a(26) =21600a(27) =23521a(28) =25444a(29) =27369