Number of (n+2) X (1+2) 0..3 arrays x(i,j) with each element diagonally 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.
A230970
Number of (n+2) X (1+2) 0..3 arrays x(i,j) with each element diagonally 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) =16a(2) =64a(3) =256a(4) =1344a(5) =7056a(6) =34944a(7) =173056a(8) =866944a(9) =4343056a(10) =21706944a(11) =108493056a(12) =542506944a(13) =2712743056a(14) =13563506944a(15) =67816493056a(16) =339083506944
External references
- oeis: A230970