Number of nX2 arrays containing 2 copies of 0..n-1 with no element 1 greater than its west or northeast neighbor modulo n and the upper left element equal to 0.
A266865
Number of nX2 arrays containing 2 copies of 0..n-1 with no element 1 greater than its west or northeast neighbor modulo n and the upper left element equal to 0.
Terms
- a(0) =1a(1) =0a(2) =4a(3) =72a(4) =2760a(5) =154240a(6) =12199500a(7) =1293877704a(8) =177333949072
External references
- oeis: A266865