a(n) is the decimal concatenation of n and n^2.

Terms

a(0) =11a(1) =24a(2) =39a(3) =416a(4) =525a(5) =636a(6) =749a(7) =864a(8) =981a(9) =10100a(10) =11121a(11) =12144a(12) =13169a(13) =14196a(14) =15225a(15) =16256a(16) =17289a(17) =18324a(18) =19361a(19) =20400a(20) =21441a(21) =22484a(22) =23529a(23) =24576a(24) =25625a(25) =26676a(26) =27729a(27) =28784a(28) =29841a(29) =30900