Number of nX(n+4) arrays of permutations of n+4 copies of 0..n-1 with every element equal to or 1 greater than any north or northeast neighbors modulo n and the upper left element equal to 0.
A267557
Number of nX(n+4) arrays of permutations of n+4 copies of 0..n-1 with every element equal to or 1 greater than any north or northeast neighbors modulo n and the upper left element equal to 0.
Terms
- a(0) =1a(1) =462a(2) =2109a(3) =18530a(4) =252726a(5) =5621462a(6) =200130901a(7) =11067625668
External references
- oeis: A267557