login
This site is supported by donations to The OEIS Foundation.

 

Logo

Annual appeal: Please make a donation to keep the OEIS running! Over 6000 articles have referenced us, often saying "we discovered this result with the help of the OEIS".
Other ways to donate

Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A209543 T(n,k)=Number of nXk array permutations with every element making zero or one right-handed knight moves (out 2, right 1) 7
1, 1, 1, 1, 1, 1, 1, 2, 2, 1, 1, 4, 16, 4, 1, 1, 8, 72, 72, 8, 1, 1, 16, 243, 729, 243, 16, 1, 1, 32, 1125, 6480, 6480, 1125, 32, 1, 1, 64, 5000, 63504, 103680, 63504, 5000, 64, 1, 1, 128, 20480, 635040, 2080800, 2080800, 635040, 20480, 128, 1, 1, 256, 86528, 6350400 (list; table; graph; refs; listen; history; text; internal format)
OFFSET

1,8

COMMENTS

Table starts

.1..1.....1.......1.........1............1..............1................1

.1..1.....2.......4.........8...........16.............32...............64

.1..2....16......72.......243.........1125...........5000............20480

.1..4....72.....729......6480........63504.........635040..........6350400

.1..8...243....6480....103680......2080800.......42166080........833285376

.1.16..1125...63504...2080800.....92160000.....4045204800.....171889843216

.1.32..5000..635040..42166080...4045204800...366400000000...33556714023168

.1.64.20480.6350400.833285376.171889843216.33556714023168.6638067426640896

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..143

EXAMPLE

Some solutions for n=4 k=4

..6..8..2.10....6..1..2..3....6..7..2..3....0..8..2..3....6..7..2..3

..4.12..0..7...10.12..0.14....4..5..0..1....4..5.13..7....4.12..0..1

..1.15..3.11....8..9..4.11...14..9.10.11....1..9.10.11....8..9.10.11

..5.13.14..9....5.13..7.15...12.13..8.15...12..6.14.15....5.13.14.15

CROSSREFS

Sequence in context: A113021 A152937 A064552 * A178655 A178304 A123585

Adjacent sequences:  A209540 A209541 A209542 * A209544 A209545 A209546

KEYWORD

nonn,tabl

AUTHOR

R. H. Hardin Mar 10 2012

STATUS

approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent | More pages
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy .

Last modified November 18 12:21 EST 2017. Contains 294891 sequences.