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

A207897

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

Terms

    a(0) =10a(1) =100a(2) =292a(3) =870a(4) =2446a(5) =6952a(6) =20168a(7) =57838a(8) =164914a(9) =473632a(10) =1360740a(11) =3896086a(12) =11165294a(13) =32038792a(14) =91859552a(15) =263284722a(16) =754983634a(17) =2164966616a(18) =6206791972a(19) =17795617610a(20) =51026354878a(21) =146302277604a(22) =419468202104

External references