Number of 4 X n arrays containing n copies of 0..4-1 with no element 1 greater than its north, northeast or northwest neighbor modulo 4 and the upper left element equal to 0.
A266888
Number of 4 X n arrays containing n copies of 0..4-1 with no element 1 greater than its north, northeast or northwest neighbor modulo 4 and the upper left element equal to 0.
Terms
- a(0) =2a(1) =22a(2) =322a(3) =5826a(4) =116602a(5) =2507350a(6) =56777970a(7) =1336707816a(8) =32440959218a(9) =806165939746
External references
- oeis: A266888