10^n-th nonsquarefree number.

Terms

a(0) =4a(1) =27a(2) =260a(3) =2550a(4) =25506a(5) =255051a(6) =2550519a(7) =25505464a(8) =255054546a(9) =2550546152a(10) =25505460948a(11) =255054609189