login
The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A263424 T(n,k)=Number of nXk arrays of permutations of 0..n*k-1 with each element moved a city block distance of 0 or 2. 5
1, 1, 1, 2, 4, 2, 4, 36, 36, 4, 6, 196, 1272, 196, 6, 9, 961, 26244, 26244, 961, 9, 15, 5329, 532620, 1993744, 532620, 5329, 15, 25, 29584, 11751184, 141086884, 141086884, 11751184, 29584, 25, 40, 160000, 256052940, 10808097444, 34502512032 (list; table; graph; refs; listen; history; text; internal format)
OFFSET

1,4

COMMENTS

Table starts

..1......1..........2............4.............6.............9...............15

..1......4.........36..........196...........961..........5329............29584

..2.....36.......1272........26244........532620......11751184........256052940

..4....196......26244......1993744.....141086884...10808097444.....831331827076

..6....961.....532620....141086884...34502512032.9414955824400.2581177525941432

..9...5329...11751184..10808097444.9414955824400

.15..29584..256052940.831331827076

.25.160000.5521233025

.40.868624

.64

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..60

FORMULA

Empirical for column k:

k=1: a(n) = a(n-1) +a(n-3) +a(n-4)

k=2: [order 15]

k=3: [order 64]

EXAMPLE

Some solutions for n=3 k=4

..2..9..0..1....8..9..7..6....0..4..7..6....8..4..0..3....5..6.10.11

..4..7.11.10....1..5.11..2....9..2..1.10....1..5.11..7....1..0..4..7

..5..6..8..3....0..4.10..3....5.11..8..3...10..9..2..6....8..9..2..3

CROSSREFS

Column 1 is A006498.

Sequence in context: A139548 A193378 A108445 * A279527 A019294 A238262

Adjacent sequences:  A263421 A263422 A263423 * A263425 A263426 A263427

KEYWORD

nonn,tabl

AUTHOR

R. H. Hardin, Oct 17 2015

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
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified April 23 13:14 EDT 2021. Contains 343204 sequences. (Running on oeis4.)