Number of n X 2 0..5 arrays with no element x(i,j) adjacent to value 5-x(i,j) horizontally or vertically, top left element zero, and 1 appearing before 2 3 and 4, and 2 appearing before 3 in row major order.
A233107
Number of n X 2 0..5 arrays with no element x(i,j) adjacent to value 5-x(i,j) horizontally 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) =2a(1) =19a(2) =313a(3) =6046a(4) =123352a(5) =2565169a(6) =53692063a(7) =1126297996a(8) =23643610702a(9) =496455294319
External references
- oeis: A233107