Number of 3 X n matrices containing a permutation of 1..3*n in increasing order rowwise, columnwise and (downwards) antidiagonally.
A181197
Number of 3 X n matrices containing a permutation of 1..3*n in increasing order rowwise, columnwise and (downwards) antidiagonally.
Terms
- a(0) =1a(1) =1a(2) =4a(3) =29a(4) =290a(5) =3532a(6) =49100a(7) =750325a(8) =12310294a(9) =213446666a(10) =3868253164a(11) =72686739116
External references
- oeis: A181197