A013996 Number of edge-disjoint paths between opposite corners of 7 X n grid.

1, 1, 128, 33850, 18787340, 13662905466, 10816244385930, 8900924886661736, 7466577706821521924, 6332745788043635410871, 5399881205287667310503858, 4621213692709052543074522862

Offset

0,3

References

rec.puzzles Dec 10 1995.

Links

Sean A. Irvine, Table of n, a(n) for n = 0..50

Crossrefs

Sequence in context: A264189 A264076 A067822 * A239648 A364173 A239404

Adjacent sequences: A013993 A013994 A013995 * A013997 A013998 A013999

Keyword

nonn

Author

Dan Hoey

Status

approved