Integer-sided squares, no more than a(n) of any size, can tile the square with side n.

Terms

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