Number of 4Xn 0..1 arrays with row sums equal and column sums unequal to adjacent columns.
A202745
Number of 4Xn 0..1 arrays with row sums equal and column sums unequal to adjacent columns.
Terms
- a(0) =2a(1) =10a(2) =86a(3) =838a(4) =6870a(5) =62398a(6) =613950a(7) =6018166a(8) =59293518a(9) =601267870a(10) =6215708078a(11) =64727555230a(12) =679456522670
External references
- oeis: A202745