Number of 4Xn arrays containing n copies of 0..4-1 with no element 1 greater than its north, west or northeast neighbor modulo 4 and the upper left element equal to 0.
A266293
Number of 4Xn arrays containing n copies of 0..4-1 with no element 1 greater than its north, west or northeast neighbor modulo 4 and the upper left element equal to 0.
Terms
- a(0) =2a(1) =9a(2) =91a(3) =1233a(4) =18827a(5) =323444a(6) =5826961a(7) =110866391a(8) =2163054304a(9) =43343013317a(10) =881391937160
External references
- oeis: A266293