Number of 3Xn arrays containing n copies of 0..3-1 avoiding the pattern down-up in every row and column.
A269507
Number of 3Xn arrays containing n copies of 0..3-1 avoiding the pattern down-up in every row and column.
Terms
- a(0) =4a(1) =54a(2) =420a(3) =3088a(4) =25226a(5) =239994a(6) =2338286a(7) =23240168a(8) =232006814a(9) =2352889414a(10) =24069853302a(11) =248560741574
External references
- oeis: A269507