Perfect squares whose decimal expansion consists of k > 1 digits, k-1 of which are equal.

Terms

a(0) =16a(1) =25a(2) =36a(3) =49a(4) =64a(5) =81a(6) =100a(7) =121a(8) =144a(9) =225a(10) =400a(11) =441a(12) =484a(13) =676a(14) =900a(15) =1444a(16) =10000a(17) =40000a(18) =44944a(19) =90000a(20) =1000000a(21) =4000000a(22) =9000000a(23) =100000000a(24) =400000000a(25) =900000000a(26) =10000000000a(27) =40000000000a(28) =90000000000a(29) =1000000000000