Number of perfect squared squares of order n up to symmetries of the square.

Terms

a(0) =0a(1) =0a(2) =0a(3) =0a(4) =0a(5) =0a(6) =0a(7) =0a(8) =0a(9) =0a(10) =0a(11) =0a(12) =0a(13) =0a(14) =0a(15) =0a(16) =0a(17) =0a(18) =0a(19) =0a(20) =1a(21) =8a(22) =12a(23) =30a(24) =172a(25) =541a(26) =1372a(27) =3949a(28) =10209a(29) =26234