Number of nX4 0..2 arrays x(i,j) with each element horizontally or vertically next to at least one element with value (x(i,j)+1) mod 3, and upper left element zero.
A230271
Number of nX4 0..2 arrays x(i,j) with each element horizontally or vertically next to at least one element with value (x(i,j)+1) mod 3, and upper left element zero.
Terms
- a(0) =0a(1) =8a(2) =258a(3) =5734a(4) =115630a(5) =2348840a(6) =47524048a(7) =960953664a(8) =19434635008a(9) =393014342648
External references
- oeis: A230271