Number of (undirected) paths in the 2 X n rook graph.

A360878

Number of (undirected) paths in the 2 X n rook graph.

Terms

    a(0) =1a(1) =12a(2) =129a(3) =1984a(4) =45945a(5) =1524156a(6) =68838217a(7) =4070403744a(8) =305642504529

External references