Number of 4Xn arrays containing n copies of 0..4-1 with no element 1 greater than its west or northeast neighbor modulo 4 and the upper left element equal to 0.
A266869
Number of 4Xn arrays containing n copies of 0..4-1 with no element 1 greater than its west or northeast neighbor modulo 4 and the upper left element equal to 0.
Terms
- a(0) =6a(1) =72a(2) =1304a(3) =31501a(4) =843874a(5) =24244702a(6) =728850883a(7) =22663306978a(8) =723210750621
External references
- oeis: A266869