T(n,k)=Number of nXk 0..5 arrays with no element x(i,j) adjacent to value 5-x(i,j) horizontally, antidiagonally or vertically, top left element zero, and 1 appearing before 2 3 and 4, and 2 appearing before 3 in row major order.
A233147
T(n,k)=Number of nXk 0..5 arrays with no element x(i,j) adjacent to value 5-x(i,j) horizontally, 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) =16a(5) =6a(6) =23a(7) =225a(8) =225a(9) =23a(10) =99a(11) =3727a(12) =13259a(13) =3727a(14) =99a(15) =452a(16) =65120a(17) =845917a(18) =845917a(19) =65120a(20) =452a(21) =2136a(22) =1158334a(23) =54777233a(24) =198313130a(25) =54777233a(26) =1158334a(27) =2136a(28) =10313a(29) =20726079
External references
- oeis: A233147