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!)
A266293 Number of 4Xn arrays containing n copies of 0..4-1 with no element 1 greater than its north, west or northeast neighbor modulo 4 and the upper left element equal to 0. 1
2, 9, 91, 1233, 18827, 323444, 5826961, 110866391, 2163054304, 43343013317, 881391937160, 18187248704334, 378905566162207, 7966181836169943, 168631785538687281, 3592456489311716500, 76933383114445494985 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Row 4 of A266291.

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..24

EXAMPLE

Some solutions for n=5

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

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

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

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

CROSSREFS

Cf. A266291.

Sequence in context: A216691 A059477 A136553 * A224323 A240650 A011804

Adjacent sequences:  A266290 A266291 A266292 * A266294 A266295 A266296

KEYWORD

nonn

AUTHOR

R. H. Hardin, Dec 26 2015

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 August 10 16:56 EDT 2020. Contains 336381 sequences. (Running on oeis4.)