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

 

Logo

Please make a donation to keep the OEIS running. We are now in our 56th year. In the past year we added 10000 new sequences and reached almost 9000 citations (which often say "discovered thanks to the OEIS").
Other ways to donate

Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A266863 Number of 4Xn arrays containing n copies of 0..4-1 with no element 1 greater than its north or southwest neighbor modulo 4 and the upper left element equal to 0. 1
2, 39, 999, 31501, 1115170, 41983402, 1645807004, 66428315332, 2741553615797, 115161107816709, 4907346217889770, 211619921457504517, 9217713218166541066, 404959978196608770290, 17923299357990007812631, 798420742078293208625630 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Row 4 of A266861.

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..27

EXAMPLE

Some solutions for n=4

..0..2..1..3....0..2..2..0....0..2..3..1....0..2..3..1....0..2..3..2

..2..1..1..1....0..2..1..3....0..0..1..3....0..0..1..3....0..1..3..1

..2..3..3..0....0..2..3..3....0..2..3..3....2..3..1..3....2..3..1..0

..0..3..2..0....3..1..1..1....2..1..1..2....0..2..1..2....1..2..0..3

CROSSREFS

Cf. A266861.

Sequence in context: A042683 A319520 A209632 * A245053 A177773 A274574

Adjacent sequences:  A266860 A266861 A266862 * A266864 A266865 A266866

KEYWORD

nonn

AUTHOR

R. H. Hardin, Jan 04 2016

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 November 27 18:22 EST 2020. Contains 338683 sequences. (Running on oeis4.)