Number of n X 2 0..2 arrays with every element plus 1 mod 3 equal to some element at offset (-1,-1) (-1,0) (-1,1) (0,-1) (0,1) (1,-1) or (1,0), with upper left element zero.
A278000
Number of n X 2 0..2 arrays with every element plus 1 mod 3 equal to some element at offset (-1,-1) (-1,0) (-1,1) (0,-1) (0,1) (1,-1) or (1,0), with upper left element zero.
Terms
- a(0) =0a(1) =9a(2) =52a(3) =364a(4) =2523a(5) =17424a(6) =120462a(7) =832701a(8) =5756112a(9) =39789720a(10) =275050323a(11) =1901312388a(12) =13143008754a(13) =90852339501a(14) =628025724756
External references
- oeis: A278000