Number of nX4 0..1 arrays with every element equal to 2, 3, 4, 5 or 6 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.
A301396
Number of nX4 0..1 arrays with every element equal to 2, 3, 4, 5 or 6 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.
Terms
- a(0) =0a(1) =4a(2) =13a(3) =78a(4) =446a(5) =2619a(6) =15538a(7) =92338a(8) =549096a(9) =3267591a(10) =19445455a(11) =115733520a(12) =688822904a(13) =4099797460a(14) =24401669153a(15) =145237096500a(16) =864442371855
External references
- oeis: A301396