Number of 7Xn 0..1 arrays avoiding 0 0 0 and 0 1 1 horizontally and 0 0 1 and 0 1 1 vertically.
A207372
Number of 7Xn 0..1 arrays avoiding 0 0 0 and 0 1 1 horizontally and 0 0 1 and 0 1 1 vertically.
Terms
- a(0) =20a(1) =400a(2) =1260a(3) =7130a(4) =31110a(5) =95220a(6) =353808a(7) =1047717a(8) =3056647a(9) =8773795a(10) =23208895a(11) =61308120a(12) =155644140a(13) =385081690a(14) =938448639a(15) =2231352160a(16) =5231232640a(17) =12073401891a(18) =27463516024a(19) =61756669106a(20) =137220631975a(21) =301814503696
External references
- oeis: A207372