Number of (5*n) X n binary arrays with rows in nonincreasing order, 5 ones in every column and no more than 2 ones in any row.
A188406
Number of (5*n) X n binary arrays with rows in nonincreasing order, 5 ones in every column and no more than 2 ones in any row.
Terms
- a(0) =1a(1) =1a(2) =6a(3) =69a(4) =1620a(5) =62781a(6) =3710272a(7) =313568636a(8) =36218801244
External references
- oeis: A188406