A013993 Number of edge-disjoint paths between opposite corners of 4 X n grid.

1, 1, 16, 335, 9754, 323632, 11171466, 389866263, 13662905466, 479251547011, 16821606120516, 590415835527858, 20726430358013659, 727543012137899046, 25540208938124629118, 896540705406585866451

Offset

0,3

References

rec.puzzles Dec 10 1995.

Links

Sean A. Irvine, Table of n, a(n) for n = 0..100

Crossrefs

Cf. A013990, A013991, A013992, A013994, A013995, A013996, A013997.

Sequence in context: A218476 A240344 A068368 * A058722 A318013 A320399

Adjacent sequences: A013990 A013991 A013992 * A013994 A013995 A013996

Keyword

nonn

Author

Dan Hoey

Status

approved