Number of (n+1)Xn arrays containing n copies of 0..n with every element equal to or 1 greater than any northeast or northwest neighbors modulo n and the upper left element equal to 0.
A267020
Number of (n+1)Xn arrays containing n copies of 0..n with every element equal to or 1 greater than any northeast or northwest neighbors modulo n and the upper left element equal to 0.
Terms
- a(0) =1a(1) =5a(2) =21a(3) =259a(4) =5493a(5) =255437a(6) =26320280a(7) =6071784885
External references
- oeis: A267020