Number of nX6 0..3 arrays with diagonals and antidiagonals unimodal and rows nondecreasing.
A224389
Number of nX6 0..3 arrays with diagonals and antidiagonals unimodal and rows nondecreasing.
Terms
- a(0) =84a(1) =7056a(2) =319769a(3) =9331553a(4) =211856287a(5) =4364554008a(6) =90682660877
External references
- oeis: A224389