Number of 4Xn 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, no adjacent elements equal, and upper left element zero.
A231249
Number of 4Xn 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, no adjacent elements equal, and upper left element zero.
Terms
- a(0) =0a(1) =20a(2) =552a(3) =5992a(4) =76264a(5) =1081934a(6) =15270416a(7) =213355654a(8) =2979297186a(9) =41637993524a(10) =582001470148
External references
- oeis: A231249