Number of 3Xn 0..1 arrays with row sums equal and column sums unequal to adjacent columns.
A202744
Number of 3Xn 0..1 arrays with row sums equal and column sums unequal to adjacent columns.
Terms
- a(0) =2a(1) =8a(2) =38a(3) =140a(4) =638a(5) =3032a(6) =14258a(7) =70136a(8) =350594a(9) =1767452a(10) =9029918a(11) =46519544a(12) =241210598a(13) =1258499756a(14) =6598909298a(15) =34748813672a(16) =183679125026a(17) =974136322892
External references
- oeis: A202744