Number of 4Xn 0..1 arrays avoiding 0 0 0 and 0 1 0 horizontally and 0 0 0 and 1 1 1 vertically.

A207930

Number of 4Xn 0..1 arrays avoiding 0 0 0 and 0 1 0 horizontally and 0 0 0 and 1 1 1 vertically.

Terms

    a(0) =10a(1) =100a(2) =240a(3) =576a(4) =1872a(5) =6084a(6) =18096a(7) =53824a(8) =165648a(9) =509796a(10) =1542240a(11) =4665600a(12) =14251680a(13) =43533604a(14) =132223920a(15) =401601600a(16) =1223922960a(17) =3730033476a(18) =11344617648a(19) =34503805504a(20) =105068389776a(21) =319946347044a(22) =973567075392

External references