A181396 Summed lengths of nonintersecting rook paths on a 5 X n board.

4, 104, 1206, 13132, 148432, 1692480, 18893254, 205592002, 2192518424, 23040437586, 239444000256, 2466260663869, 25213885065100, 256147799888040, 2588077377850470, 26026306944344453, 260646721044701192, 2600801818956016811, 25867424061321255322, 256529866716776061643

Offset

1,1

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 5 of A181399.

Enumeration of these paths is A007787, related sequences A181394, A181395, A181397, A181398.

Sequence in context: A281534 A006415 A333434 * A354063 A196979 A197164

Adjacent sequences: A181393 A181394 A181395 * A181397 A181398 A181399

Keyword

nonn

Author

David Scambler, Oct 17 2010

Extensions

Terms a(8) and beyond from Andrew Howroyd, Jan 06 2020

Status

approved