Number of ways to reciprocally link elements of an n X 3 array either to themselves or to exactly two king-move neighbors, without consecutive collinear links.
A220714
Number of ways to reciprocally link elements of an n X 3 array either to themselves or to exactly two king-move neighbors, without consecutive collinear links.
Terms
- a(0) =1a(1) =26a(2) =226a(3) =2243a(4) =21195a(5) =201598a(6) =1913495a(7) =18172469a(8) =172565016a(9) =1638746380a(10) =15562024443a(11) =147782179281
External references
- oeis: A220714