Number of nX2 0..3 arrays with row sums equal and column sums unequal to adjacent columns.
A203026
Number of nX2 0..3 arrays with row sums equal and column sums unequal to adjacent columns.
Terms
- a(0) =12a(1) =28a(2) =120a(3) =356a(4) =1472a(5) =4780a(6) =20228a(7) =68724a(8) =296256a(9) =1034008a(10) =4501388a(11) =15995228a(12) =69888012a(13) =251506724a(14) =1098929960a(15) =3991711796a(16) =17408141792a(17) =63681484600a(18) =276945484748
External references
- oeis: A203026