Number of nX2 arrays containing 2 copies of 0..n-1 with no element 1 greater than its northeast neighbor modulo n and the upper left element equal to 0.
A266652
Number of nX2 arrays containing 2 copies of 0..n-1 with no element 1 greater than its northeast neighbor modulo n and the upper left element equal to 0.
Terms
- a(0) =1a(1) =1a(2) =11a(3) =234a(4) =8466a(5) =465690a(6) =36290610a(7) =3806425980a(8) =517149634680
External references
- oeis: A266652