Number of nX2 arrays containing 2 copies of 0..n-1 with no element 1 greater than its north, west or southeast neighbor modulo n and the upper left element equal to 0.
A267544
Number of nX2 arrays containing 2 copies of 0..n-1 with no element 1 greater than its north, west or southeast neighbor modulo n and the upper left element equal to 0.
Terms
- a(0) =1a(1) =0a(2) =1a(3) =27a(4) =555a(5) =24981a(6) =1825761a(7) =184975696a(8) =24714858112
External references
- oeis: A267544