Minimal number of smaller integer-sided squares that tile an n X n square.

Terms

a(0) =4a(1) =6a(2) =4a(3) =8a(4) =4a(5) =9a(6) =4a(7) =6a(8) =4a(9) =11a(10) =4a(11) =11a(12) =4a(13) =6a(14) =4a(15) =12a(16) =4a(17) =13a(18) =4a(19) =6a(20) =4a(21) =13a(22) =4a(23) =8a(24) =4a(25) =6a(26) =4a(27) =14a(28) =4a(29) =15