Squares formed by concatenating other squares, not ending in 0.

Terms

a(0) =49a(1) =144a(2) =169a(3) =361a(4) =441a(5) =1225a(6) =1369a(7) =1444a(8) =1681a(9) =1936a(10) =3249a(11) =4225a(12) =9025a(13) =9409a(14) =10404a(15) =11025a(16) =11449a(17) =11664a(18) =12544a(19) =14161a(20) =14641a(21) =15625a(22) =16641a(23) =19044a(24) =36481a(25) =40401a(26) =41616a(27) =42025a(28) =43681a(29) =44944