T(n,k)=Number of nXk 0..5 arrays with no element x(i,j) adjacent to value 5-x(i,j) horizontally, diagonally, antidiagonally or vertically, top left element zero, and 1 appearing before 2 3 and 4, and 2 appearing before 3 in row major order.
A233230
T(n,k)=Number of nXk 0..5 arrays with no element x(i,j) adjacent to value 5-x(i,j) horizontally, diagonally, antidiagonally or vertically, top left element zero, and 1 appearing before 2 3 and 4, and 2 appearing before 3 in row major order.
Terms
- a(0) =1a(1) =2a(2) =2a(3) =6a(4) =14a(5) =6a(6) =23a(7) =174a(8) =174a(9) =23a(10) =99a(11) =2541a(12) =8231a(13) =2541a(14) =99a(15) =452a(16) =39203a(17) =420948a(18) =420948a(19) =39203a(20) =452a(21) =2136a(22) =616454a(23) =21895530a(24) =72049266a(25) =21895530a(26) =616454a(27) =2136a(28) =10313a(29) =9757236
External references
- oeis: A233230