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!)
A181198 Number of 4 X n matrices containing a permutation of 1..4*n in increasing order rowwise, columnwise, diagonally and (downwards) antidiagonally. 2
1, 1, 8, 169, 6392, 352184, 25097600, 2152061145, 212012802584, 23263015359672, 2781709560836960, 356806123331844056, 48516442013911012288, 6930091952294051922080, 1032505514388962439665280, 159544871422153344631037625, 25451354639006231998529405016 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,3

COMMENTS

Row 4 of A181196.

LINKS

Alois P. Heinz, Table of n, a(n) for n = 1..27

EXAMPLE

Some solutions for 4 X 4:

..1..2..3..4....1..2..3..4....1..2..3..4....1..2..3..4....1..2..3..4

..5..6..7..8....5..6..7..8....5..6..7..8....5..6..7..8....5..6..7..8

..9.10.11.12....9.10.11.13....9.10.11.14....9.10.12.13....9.10.12.14

.13.14.15.16...12.14.15.16...12.13.15.16...11.14.15.16...11.13.15.16

CROSSREFS

Cf. A181196.

Sequence in context: A084941 A139564 A264113 * A302802 A316816 A001534

Adjacent sequences:  A181195 A181196 A181197 * A181199 A181200 A181201

KEYWORD

nonn

AUTHOR

R. H. Hardin, Oct 10 2010

EXTENSIONS

a(12)-a(27) from Alois P. Heinz, Jul 24 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
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified June 17 17:05 EDT 2021. Contains 345085 sequences. (Running on oeis4.)