Number of inequivalent (modulo C_4 rotations) square n X n grids with squares coming in two colors and three squares have one of the colors.

A275799

Number of inequivalent (modulo C_4 rotations) square n X n grids with squares coming in two colors and three squares have one of the colors.

Terms

    a(0) =1a(1) =22a(2) =140a(3) =578a(4) =1785a(5) =4612a(6) =10416a(7) =21340a(8) =40425a(9) =72010a(10) =121836a(11) =197582a(12) =308945a(13) =468328a(14) =690880a(15) =995352a(16) =1404081a(17) =1944030a(18) =2646700a(19) =3549370a(20) =4694921a(21) =6133292a(22) =7921200a(23) =10123828a(24) =12814425a(25) =16076242a(26) =20001996a(27) =24696070a(28) =30273825a(29) =36864080

External references