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A186547 1/8192 the number of (n+2)X3 0..3 arrays with each 3X3 subblock trace equal to some horizontal or vertical neighbor 3X3 subblock trace 1
0, 290, 2972, 168200, 3090668, 111188198, 2585394080, 78931270418, 2022581728964, 57893438838608, 1543873188898724, 43063896490838390, 1167248594013245504, 32220586362367051898, 879136485710121947756 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Column 1 of A186553

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..200

FORMULA

Empirical: a(n)=32*a(n-1)-77*a(n-2)-4496*a(n-3)+117783*a(n-4)-1083636*a(n-5)+7006716*a(n-6)-23429520*a(n-7)+57318192*a(n-8)-54976320*a(n-9)+41990400*a(n-10)

EXAMPLE

Some solutions for 4X3

..2..0..2....0..0..0....0..0..2....2..0..0....2..0..2....0..0..0....0..0..0

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

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

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

CROSSREFS

Sequence in context: A031712 A251049 A108881 * A237741 A335613 A186548

Adjacent sequences:  A186544 A186545 A186546 * A186548 A186549 A186550

KEYWORD

nonn

AUTHOR

R. H. Hardin Feb 23 2011

STATUS

approved

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Last modified October 26 11:59 EDT 2021. Contains 348267 sequences. (Running on oeis4.)