Number of 2 X n 0..5 arrays with no element x(i,j) adjacent to value 5-x(i,j) horizontally or antidiagonally, top left element zero, and 1 appearing before 2 3 and 4, and 2 appearing before 3 in row major order.
A233218
Number of 2 X n 0..5 arrays with no element x(i,j) adjacent to value 5-x(i,j) horizontally or antidiagonally, top left element zero, and 1 appearing before 2 3 and 4, and 2 appearing before 3 in row major order.
Terms
- a(0) =3a(1) =23a(2) =376a(3) =7222a(4) =147019a(5) =3054973a(6) =63927526a(7) =1340889772a(8) =28147567369a(9) =591021089923
External references
- oeis: A233218