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A239538 Number of (4+1)X(n+1) 0..2 arrays with no element equal to all horizontal neighbors or unequal to all vertical neighbors, and new values 0..2 introduced in row major order 1
13, 68, 1014, 11108, 131988, 1533792, 17931608, 209295248, 2443954640, 28534764096, 333172950560, 3890104752256, 45420709489664, 530330059963392, 6192109859155200, 72298791884174336, 844157402919585408 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Row 4 of A239537

LINKS

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

FORMULA

Empirical: a(n) = 8*a(n-1) +46*a(n-2) -22*a(n-3) -166*a(n-4) +28*a(n-5) +68*a(n-6) +208*a(n-7) -160*a(n-8) -48*a(n-9) +32*a(n-10)

EXAMPLE

Some solutions for n=4

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

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

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

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

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

CROSSREFS

Sequence in context: A229999 A258618 A093119 * A156794 A137188 A055338

Adjacent sequences:  A239535 A239536 A239537 * A239539 A239540 A239541

KEYWORD

nonn

AUTHOR

R. H. Hardin, Mar 21 2014

STATUS

approved

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Last modified September 15 02:19 EDT 2019. Contains 327062 sequences. (Running on oeis4.)