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A181398 Summed lengths of nonintersecting rook paths on an n x n board 5
0, 4, 64, 1912, 148432, 32871240 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

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

LINKS

Table of n, a(n) for n=1..6.

EXAMPLE

For 2 x 2: right+down (length 2), down+right (length 2), s(2) = 2+2 = 4

CROSSREFS

Related sequences A181394, A181395, A181396, A181397, A181399

Sequence in context: A050636 A098698 A301583 * A326274 A081559 A298433

Adjacent sequences:  A181395 A181396 A181397 * A181399 A181400 A181401

KEYWORD

nonn

AUTHOR

David Scambler, Oct 17 2010

STATUS

approved

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Last modified October 20 22:44 EDT 2019. Contains 328291 sequences. (Running on oeis4.)