Number of simple perfect squared squares of order n up to symmetry.

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) =26a(24) =160a(25) =441a(26) =1152a(27) =3001a(28) =7901a(29) =20566