T(n,k)=Number of nXk 0..3 arrays with no element x(i,j) adjacent to value 3-x(i,j) horizontally or vertically, top left element zero, and 1 appearing before 2 in row major order.
A233018
T(n,k)=Number of nXk 0..3 arrays with no element x(i,j) adjacent to value 3-x(i,j) horizontally or vertically, top left element zero, and 1 appearing before 2 in row major order.
Terms
- a(0) =1a(1) =2a(2) =2a(3) =5a(4) =11a(5) =5a(6) =14a(7) =74a(8) =74a(9) =14a(10) =41a(11) =515a(12) =1202a(13) =515a(14) =41a(15) =122a(16) =3602a(17) =19643a(18) =19643a(19) =3602a(20) =122a(21) =365a(22) =25211a(23) =321125a(24) =750092a(25) =321125a(26) =25211a(27) =365a(28) =1094a(29) =176474
External references
- oeis: A233018