Number of nX2 arrays containing 2 copies of 0..n-1 with no element 1 greater than its west, northeast or southeast neighbor modulo n and the upper left element equal to 0.
A267221
Number of nX2 arrays containing 2 copies of 0..n-1 with no element 1 greater than its west, northeast or southeast neighbor modulo n and the upper left element equal to 0.
Terms
- a(0) =1a(1) =0a(2) =3a(3) =35a(4) =889a(5) =52759a(6) =4249084a(7) =454920734a(8) =62723579604
External references
- oeis: A267221