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A233685 Number of (n+1)X(2+1) 0..3 arrays with every 2X2 subblock having the sum of the squares of the edge differences equal to 10, and no two adjacent values equal 1
108, 548, 2628, 13324, 64756, 327588, 1596200, 8064200, 39342364, 198550888, 969646256, 4888808640, 23897490056, 120377986076, 588951127540, 2964164674456, 14514267629692, 72990785983124, 357684877930284 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 2 of A233691

LINKS

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

FORMULA

Empirical: a(n) = a(n-1) +28*a(n-2) -25*a(n-3) -103*a(n-4) +97*a(n-5) +68*a(n-6) -47*a(n-7) -12*a(n-8) +2*a(n-9)

EXAMPLE

Some solutions for n=5

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

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

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

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

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

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

CROSSREFS

Sequence in context: A255083 A063880 A059436 * A160919 A129027 A288706

Adjacent sequences:  A233682 A233683 A233684 * A233686 A233687 A233688

KEYWORD

nonn

AUTHOR

R. H. Hardin, Dec 14 2013

STATUS

approved

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Last modified November 27 20:49 EST 2021. Contains 349395 sequences. (Running on oeis4.)