Number of n X 4 0..3 arrays x(i,j) with each element horizontally or antidiagonally next to at least one element with value (x(i,j)+1) mod 4, no adjacent elements equal, and upper left element zero.
A231104
Number of n X 4 0..3 arrays x(i,j) with each element horizontally or antidiagonally next to 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) =6a(2) =48a(3) =438a(4) =3936a(5) =35430a(6) =318864a(7) =2869782a(8) =25828032a(9) =232452294a(10) =2092070640a(11) =18828635766a(12) =169457721888
External references
- oeis: A231104