Number of n X n (0,1) matrices such that each row and each column is nondecreasing or nonincreasing.
A032260
Number of n X n (0,1) matrices such that each row and each column is nondecreasing or nonincreasing.
Terms
- a(0) =2a(1) =16a(2) =102a(3) =528a(4) =2470a(5) =11016a(6) =47950a(7) =205792a(8) =874998a(9) =3694920a(10) =15519262a(11) =64899456a(12) =270415262a(13) =1123264408a(14) =4653525150a(15) =19234571968a(16) =79342610902a(17) =326704870152
External references
- oeis: A032260