Number of nX2 arrays containing 2 copies of 0..n-1 with no element 1 greater than its north, southwest or southeast neighbor modulo n and the upper left element equal to 0.
A266919
Number of nX2 arrays containing 2 copies of 0..n-1 with no element 1 greater than its north, southwest or southeast neighbor modulo n and the upper left element equal to 0.
Terms
- a(0) =1a(1) =0a(2) =4a(3) =23a(4) =398a(5) =23432a(6) =1841274a(7) =193070360a(8) =26165335486
External references
- oeis: A266919