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!)
A241261 Number of 7Xn 0..3 arrays with no element equal to one plus the sum of elements to its left or zero plus the sum of the elements above it or one plus the sum of the elements diagonally to its northwest or zero plus the sum of the elements antidiagonally to its northeast, modulo 4 0
20, 488, 2111, 13328, 225191, 1558957, 13138271, 205823368, 1596727720, 16865140873 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Row 7 of A241255

LINKS

Table of n, a(n) for n=1..10.

EXAMPLE

Some solutions for n=3

..3..3..2....3..3..2....2..2..3....3..3..2....3..3..2....3..3..2....3..3..2

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

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

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

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

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

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

CROSSREFS

Sequence in context: A159753 A252975 A000827 * A118552 A270578 A255492

Adjacent sequences:  A241258 A241259 A241260 * A241262 A241263 A241264

KEYWORD

nonn

AUTHOR

R. H. Hardin, Apr 18 2014

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 June 28 12:59 EDT 2022. Contains 354907 sequences. (Running on oeis4.)