Number of nX4 0..1 arrays with every element equal to 1, 2, 3, 5 or 6 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.
A303250
Number of nX4 0..1 arrays with every element equal to 1, 2, 3, 5 or 6 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.
Terms
- a(0) =2a(1) =45a(2) =203a(3) =1401a(4) =8664a(5) =55624a(6) =349273a(7) =2229806a(8) =14141138a(9) =89782352a(10) =570414504a(11) =3623364042a(12) =23013173083a(13) =146192778743a(14) =928659809148
External references
- oeis: A303250