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A189656 Number of 8Xn array permutations with each element moving zero or one space horizontally, diagonally or antidiagonally 1
1, 23409, 9648721, 39401919001, 74192202677913, 211788908613601649, 517069529154777840681, 1369385680210307625221600, 3514075326766461571852637721, 9167946522672764796730050799825 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Row 8 of A189650

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..17

EXAMPLE

Some solutions for 8X3

..0..1..2....0..1..2....0..1..2....0..1..2....0..1..2....0..1..2....0..1..2

..4..3..5....4..3..5....4..3..5....4..3..5....4..3..5....4..3..5....4..3..5

..6..8.10....6..8..7....7..6.10....7..6..8....7..6..8....6..8..7....6..8..7

..7..9.11....9.11.10....9..8.11...13..9.11...10..9.11....9.14.10....9.11.13

.12.17.14...16.12.14...12.15.13...10.17.14...16.12.14...12.11.16...10.12.14

.15.18.13...15.20.13...19.14.17...15.12.19...15.18.13...13.20.17...15.16.17

.16.19.20...18.17.19...16.18.20...18.20.16...22.17.20...18.15.19...19.20.22

.22.21.23...22.21.23...21.23.22...22.21.23...21.23.19...21.22.23...21.18.23

CROSSREFS

Sequence in context: A153771 A252944 A246891 * A204074 A031847 A237528

Adjacent sequences:  A189653 A189654 A189655 * A189657 A189658 A189659

KEYWORD

nonn

AUTHOR

R. H. Hardin Apr 24 2011

STATUS

approved

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Last modified March 29 15:03 EDT 2020. Contains 333107 sequences. (Running on oeis4.)