Number of n X n 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.
A233012
Number of n X n 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) =11a(2) =1202a(3) =750092a(4) =2555361596
External references
- oeis: A233012