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

 

Logo

Year-end appeal: Please make a donation to the OEIS Foundation to support ongoing development and maintenance of the OEIS. We are now in our 56th year, we are closing in on 350,000 sequences, and we’ve crossed 9,700 citations (which often say “discovered thanks to the OEIS”).

Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A185836 Number of (n+1)X(n+1) 0..2 arrays with every 2X2 subblock trace equal to some horizontal or vertical neighbor 2X2 subblock trace 0
0, 1773, 424197, 560733777, 3293066139075, 91469611366917651 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Diagonal of A185845

LINKS

Table of n, a(n) for n=1..6.

EXAMPLE

Some solutions for 3X3

..0..1..0....1..2..2....0..0..2....0..2..2....2..0..1....0..0..1....1..0..2

..2..1..0....0..0..0....0..1..1....0..1..0....0..0..1....0..1..2....2..1..2

..1..0..1....1..1..2....2..1..0....1..1..1....1..2..1....2..1..1....2..1..2

CROSSREFS

Sequence in context: A155023 A176478 A187132 * A047826 A143995 A205938

Adjacent sequences:  A185833 A185834 A185835 * A185837 A185838 A185839

KEYWORD

nonn

AUTHOR

R. H. Hardin Feb 05 2011

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 December 2 11:44 EST 2021. Contains 349440 sequences. (Running on oeis4.)