Number of ways to reciprocally link elements of an n X 7 array either to themselves or to exactly one king-move neighbor.
A220643
Number of ways to reciprocally link elements of an n X 7 array either to themselves or to exactly one king-move neighbor.
Terms
- a(0) =1a(1) =21a(2) =13152a(3) =3725843a(4) =1299348473a(5) =431408410784
External references
- oeis: A220643