Squares with initial digit '6'.

Terms

a(0) =64a(1) =625a(2) =676a(3) =6084a(4) =6241a(5) =6400a(6) =6561a(7) =6724a(8) =6889a(9) =60025a(10) =60516a(11) =61009a(12) =61504a(13) =62001a(14) =62500a(15) =63001a(16) =63504a(17) =64009a(18) =64516a(19) =65025a(20) =65536a(21) =66049a(22) =66564a(23) =67081a(24) =67600a(25) =68121a(26) =68644a(27) =69169a(28) =69696a(29) =600625