1/8 the number of n X 2 0..7 arrays with every element equal to exactly one or two of its horizontal and vertical neighbors.
A185899
1/8 the number of n X 2 0..7 arrays with every element equal to exactly one or two of its horizontal and vertical neighbors.
Terms
- a(0) =1a(1) =15a(2) =196a(3) =2765a(4) =38731a(5) =545328a(6) =7675381a(7) =108065699a(8) =1521488668a(9) =21421955457a(10) =301612441375
External references
- oeis: A185899