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A239156 Number of (3+1)X(n+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, 55, 868, 12159, 175471, 2519488, 36221263, 520615791, 7483320292, 107564015719, 1546111034695, 22223587182336, 319438814614615, 4591569914960743, 65998599449004004, 948654862324898319 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Row 3 of A239155

LINKS

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

FORMULA

Empirical: a(n) = 14*a(n-1) +14*a(n-2) -124*a(n-3) -6*a(n-4) +90*a(n-5) -27*a(n-6)

EXAMPLE

Some solutions for n=4

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

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

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

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

CROSSREFS

Sequence in context: A180829 A227544 A094656 * A117993 A055056 A305282

Adjacent sequences:  A239153 A239154 A239155 * A239157 A239158 A239159

KEYWORD

nonn

AUTHOR

R. H. Hardin, Mar 11 2014

STATUS

approved

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Last modified January 24 04:47 EST 2022. Contains 350534 sequences. (Running on oeis4.)