Number of n X 3 0..3 arrays x(i,j) with each element horizontally, diagonally or antidiagonally next to at least one element with value (x(i,j)+1) mod 4 and at least one element with value (x(i,j)-1) mod 4, no adjacent elements equal, and upper left element zero.
A231044
Number of n X 3 0..3 arrays x(i,j) with each element horizontally, diagonally or antidiagonally next to at least one element with value (x(i,j)+1) mod 4 and at least one element with value (x(i,j)-1) mod 4, no adjacent elements equal, and upper left element zero.
Terms
- a(0) =0a(1) =14a(2) =50a(3) =410a(4) =2430a(5) =16198a(6) =103042a(7) =667690a(8) =4294910a(9) =27706854a(10) =178536322a(11) =1150960010a(12) =7418522110a(13) =47819461126a(14) =308233683970
External references
- oeis: A231044