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A239151 Number of (n+1)X(2+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
2, 2, 55, 208, 2778, 17050, 166531, 1221727, 10652903, 83558723, 698912193, 5620874008, 46297856418, 375826633534, 3078013187839, 25072750273992, 204911552403250, 1671311190316246, 13648365689804011, 111372868203567131 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 2 of A239155

LINKS

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

FORMULA

Empirical: a(n) = 4*a(n-1) +51*a(n-2) -84*a(n-3) -529*a(n-4) +442*a(n-5) +1605*a(n-6) +1916*a(n-7) -5423*a(n-8) -5800*a(n-9) +8753*a(n-10) +890*a(n-11) -5088*a(n-12) +4464*a(n-13) +3456*a(n-14)

EXAMPLE

Some solutions for n=5

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

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

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

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

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

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

CROSSREFS

Sequence in context: A268536 A323872 A037292 * A286377 A187024 A274477

Adjacent sequences:  A239148 A239149 A239150 * A239152 A239153 A239154

KEYWORD

nonn

AUTHOR

R. H. Hardin, Mar 11 2014

STATUS

approved

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Last modified November 30 06:28 EST 2021. Contains 349419 sequences. (Running on oeis4.)