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A239152 Number of (n+1)X(3+1) 0..3 arrays with no element equal to all horizontal neighbors or unequal to all vertical neighbors, and new values 0..3 introduced in row major order 1
7, 7, 868, 5775, 209839, 2709568, 63961519, 1049404191, 21350167780, 381843947671, 7373045875687, 135997241404032, 2577824537597143, 48074166516591223, 905276493099636196, 16948804700642238303 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 3 of A239155

LINKS

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

FORMULA

Empirical: a(n) = 20*a(n-1) +86*a(n-2) -2504*a(n-3) +7634*a(n-4) +21878*a(n-5) -95663*a(n-6) +32018*a(n-7) +100940*a(n-8) -38416*a(n-9)

EXAMPLE

Some solutions for n=5

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

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

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

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

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

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

CROSSREFS

Sequence in context: A197860 A180321 A213150 * A320914 A155846 A221114

Adjacent sequences:  A239149 A239150 A239151 * A239153 A239154 A239155

KEYWORD

nonn

AUTHOR

R. H. Hardin, Mar 11 2014

STATUS

approved

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Last modified October 22 05:15 EDT 2021. Contains 348160 sequences. (Running on oeis4.)