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A013993 Number of edge-disjoint paths between opposite corners of 4 X n grid. 6
1, 1, 16, 335, 9754, 323632, 11171466, 389866263, 13662905466, 479251547011, 16821606120516, 590415835527858, 20726430358013659, 727543012137899046, 25540208938124629118, 896540705406585866451 (list; graph; refs; listen; history; text; internal format)
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

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Last modified April 5 20:24 EDT 2020. Contains 333260 sequences. (Running on oeis4.)