Number of n X 2 0..3 arrays x(i,j) with each element horizontally, vertically, 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, and upper left element zero.
A230964
Number of n X 2 0..3 arrays x(i,j) with each element horizontally, vertically, 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, and upper left element zero.
Terms
- a(0) =0a(1) =6a(2) =22a(3) =200a(4) =1732a(5) =14384a(6) =121696a(7) =1027464a(8) =8672840a(9) =73227432a(10) =618256792a(11) =5219942472a(12) =44072147576a(13) =372102417096
External references
- oeis: A230964