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A267914 Number of 3Xn 0..2 arrays with every repeated value in every row unequal to the previous repeated value, and in every column equal to the previous repeated value, and new values introduced in row-major sequential order. 1
5, 122, 2304, 47916, 878004, 16435188, 292341636, 5209312500, 90756319716, 1576811812500, 27101734404228, 464405881704372, 7914055449851172, 134550496512585684, 2280733479912724164, 38598223339253538036 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Row 3 of A267911.

LINKS

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

FORMULA

Empirical: a(n) = 31*a(n-1) -26*a(n-2) -6768*a(n-3) +39456*a(n-4) +479232*a(n-5) -3704832*a(n-6) -12386304*a(n-7) +115867648*a(n-8) +83886080*a(n-9) -1073741824*a(n-10) for n>12

EXAMPLE

Some solutions for n=4

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

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

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

CROSSREFS

Cf. A267911.

Sequence in context: A071171 A113906 A264456 * A282882 A208394 A320978

Adjacent sequences:  A267911 A267912 A267913 * A267915 A267916 A267917

KEYWORD

nonn

AUTHOR

R. H. Hardin, Jan 22 2016

STATUS

approved

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Last modified May 25 19:19 EDT 2022. Contains 354071 sequences. (Running on oeis4.)