Number of ways to reciprocally link elements of an nX4 array either to themselves or to exactly two king-move neighbors, without consecutive collinear links.
A220715
Number of ways to reciprocally link elements of an nX4 array either to themselves or to exactly two king-move neighbors, without consecutive collinear links.
Terms
- a(0) =1a(1) =118a(2) =2243a(3) =72923a(4) =2126423a(5) =63806966a(6) =1902974315a(7) =56814065240
External references
- oeis: A220715