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A232961 Number of 7Xn 0..3 arrays with no element x(i,j) adjacent to value 3-x(i,j) horizontally, diagonally or antidiagonally, and top left element zero 1
4096, 352947, 85202361, 18193384251, 4082986991091, 913176469752921, 205030957086979647, 46049854148275821783, 10347651822185274889503, 2325450833294278864661895, 522642603826819656267942471 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Row 7 of A232955

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..210

EXAMPLE

Some solutions for n=2

..0..0....0..2....0..2....0..2....0..2....0..2....0..2....0..0....0..2....0..0

..2..2....0..2....0..0....0..2....0..2....0..2....0..0....0..0....0..2....0..0

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

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

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

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

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

CROSSREFS

Sequence in context: A066390 A016806 A231844 * A223966 A195660 A321836

Adjacent sequences:  A232958 A232959 A232960 * A232962 A232963 A232964

KEYWORD

nonn

AUTHOR

R. H. Hardin, Dec 02 2013

STATUS

approved

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Last modified August 18 13:25 EDT 2019. Contains 326100 sequences. (Running on oeis4.)