T(n,k)=Number of nXk 0..3 arrays with no element x(i,j) adjacent to value 3-x(i,j) horizontally, antidiagonally or vertically, top left element zero, and 1 appearing before 2 in row major order.
A233073
T(n,k)=Number of nXk 0..3 arrays with no element x(i,j) adjacent to value 3-x(i,j) horizontally, antidiagonally 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) =9a(5) =5a(6) =14a(7) =50a(8) =50a(9) =14a(10) =41a(11) =289a(12) =582a(13) =289a(14) =41a(15) =122a(16) =1682a(17) =6854a(18) =6854a(19) =1682a(20) =122a(21) =365a(22) =9801a(23) =80811a(24) =164495a(25) =80811a(26) =9801a(27) =365a(28) =1094a(29) =57122
External references
- oeis: A233073