Number of ways to reciprocally link elements of an nX6 array either to themselves or to exactly two king-move neighbors, without 3-loops.
A220651
Number of ways to reciprocally link elements of an nX6 array either to themselves or to exactly two king-move neighbors, without 3-loops.
Terms
- a(0) =1a(1) =1441a(2) =816159a(3) =389859889a(4) =179768901595
External references
- oeis: A220651