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A205603 Number of (n+1)X3 0..3 arrays with every 2X2 subblock having the same number of equal edges as its horizontal neighbors and a different number from its vertical neighbors, and new values 0..3 introduced in row major order 1
77, 1030, 15896, 248392, 3889612, 60868362, 953231848, 14922106020, 233649216140, 3657937755750, 57272812041768, 896673748420488, 14039041888152956, 219800897926415930, 3441347712503165720 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 2 of A205609

LINKS

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

FORMULA

Empirical: a(n) = 192*a(n-2) +1024*a(n-3) -994*a(n-4) -29144*a(n-5) -57188*a(n-6) +259824*a(n-7) +773391*a(n-8) -743544*a(n-9) -3411360*a(n-10) -399168*a(n-11) +4852224*a(n-12) +2985984*a(n-13) for n>14

EXAMPLE

Some solutions for n=4

..0..0..0....0..1..1....0..1..0....0..1..0....0..1..1....0..0..0....0..0..0

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

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

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

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

CROSSREFS

Sequence in context: A176632 A093277 A217643 * A073931 A296989 A105253

Adjacent sequences:  A205600 A205601 A205602 * A205604 A205605 A205606

KEYWORD

nonn

AUTHOR

R. H. Hardin Jan 29 2012

STATUS

approved

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Last modified June 1 09:27 EDT 2020. Contains 334759 sequences. (Running on oeis4.)