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A209541 Number of nX6 array permutations with every element making zero or one right-handed knight moves (out 2, right 1) 1
1, 16, 1125, 63504, 2080800, 92160000, 4045204800, 171889843216, 7330747451944, 316825404168100, 13575541351218337, 583084349120160000, 25065468339217054272, 1077387582576682598400, 46295580843818152835625 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Column 6 of A209543

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..132

EXAMPLE

Some solutions for n=4

..0..9.13.11..4..5....0..1.13..3..4.16....0.12.10.14..4..5....8..1..2.11.15..5

..6..7..8..1..2.22....6..7.19..9..2.11....6..7.16.20.21.22....6.18..0.20.10..3

.20.21..3.23.16.17...20.21.22.23..5.17....1..2..3.15..8.17...12.21.22..4.16.17

.18.19.12.10.14.15...18..8.12.10.14.15...18.19..9.13.11.23....7.19..9.13.14.23

CROSSREFS

Sequence in context: A210822 A265622 A144915 * A279295 A353029 A053903

Adjacent sequences: A209538 A209539 A209540 * A209542 A209543 A209544

KEYWORD

nonn

AUTHOR

R. H. Hardin Mar 10 2012

STATUS

approved

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Last modified November 29 01:35 EST 2022. Contains 358421 sequences. (Running on oeis4.)