A181397 Summed lengths of nonintersecting rook paths on a 6 X n board.

5, 256, 4882, 88608, 1692480, 32871240, 629907345, 11836974284, 218772951624, 3990894156672, 72039322124013, 1289057677580204, 22896767645452466, 404155803725865164, 7095412544059877973, 123985136981584276480, 2157631059961863479079, 37411816576772657794784

Offset: 1

Author

David Scambler, Oct 17 2010

Keywords

• nonn

Comments

Paths are self-avoiding from one corner to the diagonally opposite corner.

Links

• Andrew Howroyd, Table of n, a(n) for n = 1..200

Crossrefs

Row 6 of A181399.

Related sequences A181394, A181395, A181396, A181398.

Extensions

Terms a(7) and beyond from Andrew Howroyd, Jan 06 2020