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A238512 Number of (n+1)X(3+1) 0..3 arrays with no element equal to all horizontal neighbors or equal to all vertical neighbors, and new values 0..3 introduced in row major order 1
295, 14407, 2074468, 232354383, 27474561391, 3210307720768, 376089959883919, 44034161734024287, 5156342833939923172, 603784568551904193175, 70700880287741698132135, 8278793823713613200756352 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 3 of A238515

LINKS

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

FORMULA

Empirical: a(n) = 104*a(n-1) +1814*a(n-2) -33896*a(n-3) +122714*a(n-4) +37814*a(n-5) -424991*a(n-6) -78106*a(n-7) +187964*a(n-8) -38416*a(n-9)

EXAMPLE

Some solutions for n=2

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

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

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

CROSSREFS

Sequence in context: A252083 A279052 A237803 * A003780 A206339 A107924

Adjacent sequences:  A238509 A238510 A238511 * A238513 A238514 A238515

KEYWORD

nonn

AUTHOR

R. H. Hardin, Feb 27 2014

STATUS

approved

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Last modified December 10 04:04 EST 2019. Contains 329885 sequences. (Running on oeis4.)