Number of nX2 arrays containing 2 copies of 0..n-1 with no element 1 greater than its north, northeast or northwest neighbor modulo n and the upper left element equal to 0.
A266884
Number of nX2 arrays containing 2 copies of 0..n-1 with no element 1 greater than its north, northeast or northwest neighbor modulo n and the upper left element equal to 0.
Terms
- a(0) =1a(1) =0a(2) =1a(3) =22a(4) =525a(5) =26100a(6) =1916217a(7) =197069522a(8) =26421089461
External references
- oeis: A266884