Number of ways to reciprocally link elements of an nX3 array either to themselves or to exactly two king-move neighbors.
A220591
Number of ways to reciprocally link elements of an nX3 array either to themselves or to exactly two king-move neighbors.
Terms
- a(0) =1a(1) =33a(2) =423a(3) =6156a(4) =87542a(5) =1250507a(6) =17847210a(7) =254759570a(8) =3636434730a(9) =51906768670a(10) =740920520709
External references
- oeis: A220591