Number of 4Xn arrays containing n copies of 0..4-1 with no element 1 greater than its north, west or southeast neighbor modulo 4 and the upper left element equal to 0.
A267547
Number of 4Xn arrays containing n copies of 0..4-1 with no element 1 greater than its north, west or southeast neighbor modulo 4 and the upper left element equal to 0.
Terms
- a(0) =2a(1) =27a(2) =255a(3) =3527a(4) =51759a(5) =852932a(6) =14954188a(7) =273141379a(8) =5179064643a(9) =100829282975
External references
- oeis: A267547