A013990 Number of edge-disjoint paths between opposite corners of n X n grid.

1, 1, 2, 16, 800, 323632, 1086297184, 30766606427588, 7466577706821521924, 15681997226277809235573754, 286995508313697459220070082104780, 45988915870193885369543805313062149050276

Offset

0,3

References

rec.puzzles Dec 10 1995

Links

Table of n, a(n) for n=0..11.

Crossrefs

Cf. A013991, A013992, A013993, A013994, A013995, A013996, A013997.

Sequence in context: A012920 A013088 A013137 * A013005 A013000 A013178

Adjacent sequences: A013987 A013988 A013989 * A013991 A013992 A013993

Keyword

nonn,hard

Author

Dan Hoey

Extensions

a(10) and a(11) from Sean A. Irvine, Sep 24 2018

Status

approved