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A232958 Number of 4Xn 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
64, 1029, 27441, 685251, 17429409, 442227825, 11228712351, 285082486341, 7238105184837, 183771148650939, 4665845904118053, 118463173683294573, 3007712801760687567, 76364121654785540601, 1938841730920089921489 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Row 4 of A232955

LINKS

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

FORMULA

Empirical: a(n) = 24*a(n-1) +76*a(n-2) -1008*a(n-3) -992*a(n-4) +8762*a(n-5) -7403*a(n-6) -2174*a(n-7) +3324*a(n-8) -416*a(n-9) -96*a(n-10)

EXAMPLE

Some solutions for n=3

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

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

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

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

CROSSREFS

Sequence in context: A297612 A000768 A230972 * A231952 A223018 A221247

Adjacent sequences:  A232955 A232956 A232957 * A232959 A232960 A232961

KEYWORD

nonn

AUTHOR

R. H. Hardin, Dec 02 2013

STATUS

approved

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Last modified September 25 17:35 EDT 2022. Contains 356986 sequences. (Running on oeis4.)