Number of ways to reciprocally link elements of an nX4 array either to themselves or to exactly two king-move neighbors.
A220592
Number of ways to reciprocally link elements of an nX4 array either to themselves or to exactly two king-move neighbors.
Terms
- a(0) =1a(1) =155a(2) =6156a(3) =308246a(4) =14637699a(5) =702811381a(6) =33667621356
External references
- oeis: A220592