Number of (4+1)X(n+1) 0..2 arrays with every 2X2 subblock ne-sw antidiagonal difference unequal to its neighbors horizontally and nw+se diagonal sum unequal to its neighbors vertically.
A253485
Number of (4+1)X(n+1) 0..2 arrays with every 2X2 subblock ne-sw antidiagonal difference unequal to its neighbors horizontally and nw+se diagonal sum unequal to its neighbors vertically.
Terms
- a(0) =27000a(1) =1066300a(2) =44943722a(3) =1878758740a(4) =78770049974
External references
- oeis: A253485