login
The OEIS is supported by the many generous donors to the OEIS Foundation.

 

Logo
Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A203879 Number of (n+1)X(n+1) 0..6 arrays with every 2X2 subblock having equal diagonal elements or equal antidiagonal elements 0
637, 254359, 543848893, 7265109130279, 632382967906147549 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Diagonal of A203887

LINKS

Table of n, a(n) for n=1..5.

EXAMPLE

Some solutions for n=4

..3..3..0..5..1....3..5..1..6..6....5..5..1..3..3....2..5..1..0..1

..0..3..3..0..5....2..3..5..1..6....6..5..5..1..3....6..2..5..1..6

..1..0..3..3..0....1..2..3..5..1....4..6..5..5..1....1..6..2..5..1

..6..1..0..3..3....0..1..2..3..5....4..4..6..5..5....4..1..6..2..5

..1..2..1..0..3....6..0..1..2..3....4..1..4..6..5....0..4..1..6..2

CROSSREFS

Sequence in context: A203887 A203880 A250465 * A317395 A212399 A264449

Adjacent sequences:  A203876 A203877 A203878 * A203880 A203881 A203882

KEYWORD

nonn

AUTHOR

R. H. Hardin Jan 07 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 | Recents
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified May 28 18:24 EDT 2022. Contains 354122 sequences. (Running on oeis4.)