Number of (4*n) X n binary arrays with rows in nonincreasing order, four 1's in every column and no more than three 1's in any row.
A188419
Number of (4*n) X n binary arrays with rows in nonincreasing order, four 1's in every column and no more than three 1's in any row.
Terms
- a(0) =1a(1) =5a(2) =81a(3) =3217a(4) =252493a(5) =33313408a(6) =6720357785
External references
- oeis: A188419