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A231222 Number of (n+2)X(3+2) 0..2 arrays with no element unequal to a strict majority of its horizontal, vertical, diagonal and antidiagonal neighbors, with values 0..2 introduced in row major order 1
3, 8, 21, 54, 185, 552, 1799, 5900, 19185, 63834, 210899, 701724, 2336721, 7786742, 25984043, 86721124, 289569291, 967130226, 3230474181, 10792263708, 36056118433, 120467821634, 402509354825, 1344900626136, 4493772713417 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 3 of A231227

LINKS

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

FORMULA

Empirical: a(n) = 3*a(n-1) +8*a(n-2) -18*a(n-3) -31*a(n-4) +39*a(n-5) +49*a(n-6) -73*a(n-7) +64*a(n-8) +15*a(n-9) -157*a(n-10) +98*a(n-11) +28*a(n-12) -24*a(n-13)

EXAMPLE

Some solutions for n=4

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

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

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

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

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

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

CROSSREFS

Sequence in context: A335807 A005580 A292619 * A231436 A027932 A084625

Adjacent sequences:  A231219 A231220 A231221 * A231223 A231224 A231225

KEYWORD

nonn

AUTHOR

R. H. Hardin, Nov 05 2013

STATUS

approved

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Last modified October 1 00:54 EDT 2022. Contains 357127 sequences. (Running on oeis4.)