Number of 3Xn arrays containing n copies of 0..3-1 with no equal vertical or antidiagonal neighbors and new values introduced sequentially from 0.
A265680
Number of 3Xn arrays containing n copies of 0..3-1 with no equal vertical or antidiagonal neighbors and new values introduced sequentially from 0.
Terms
- a(0) =1a(1) =4a(2) =17a(3) =75a(4) =342a(5) =1609a(6) =7794a(7) =38769a(8) =197420a(9) =1025860a(10) =5422998a(11) =29082855a(12) =157846382a(13) =865273950a(14) =4782681972a(15) =26619620697a(16) =149029471080a(17) =838498807438
External references
- oeis: A265680