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!)
A234650 Number of (n+1)X(n+1) 0..5 arrays with every 2X2 subblock having its diagonal sum differing from its antidiagonal sum by 4 (constant stress 1X1 tilings) 0
160, 2648, 28496, 274520, 2113072, 16899896, 118121744, 888784184, 6128843440 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Diagonal of A234658

LINKS

Table of n, a(n) for n=1..9.

EXAMPLE

Some solutions for n=3

..3..0..4..0....1..3..4..0....0..4..0..5....5..5..5..5....4..0..4..2

..3..4..4..4....2..0..5..5....2..2..2..3....4..0..4..0....0..0..0..2

..4..1..5..1....2..4..5..1....5..1..5..2....5..5..5..5....5..1..5..3

..1..2..2..2....5..3..0..0....3..3..3..4....0..4..0..4....1..1..1..3

CROSSREFS

Sequence in context: A013446 A013444 A013448 * A214354 A188306 A189351

Adjacent sequences:  A234647 A234648 A234649 * A234651 A234652 A234653

KEYWORD

nonn

AUTHOR

R. H. Hardin, Dec 29 2013

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 May 11 18:21 EDT 2021. Contains 343808 sequences. (Running on oeis4.)