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A231297 Number of (n+1)X(3+1) 0..2 arrays with no element unequal to a strict majority of its horizontal, vertical and antidiagonal neighbors, with values 0..2 introduced in row major order 1
4, 16, 69, 301, 1414, 6850, 33316, 162796, 797293, 3906788, 19152603, 93902795, 460455941, 2257842932, 11071788203, 54292311074, 266234310441, 1305534117780, 6401974363527, 31393453449193, 153944680060888, 754901179958837 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 3 of A231302

LINKS

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

FORMULA

Empirical: a(n) = 3*a(n-1) +17*a(n-2) -23*a(n-3) -78*a(n-4) -11*a(n-5) +143*a(n-6) +431*a(n-7) -362*a(n-8) -763*a(n-9) +176*a(n-10) -60*a(n-11) +336*a(n-12) +448*a(n-13) -256*a(n-14) for n>16

EXAMPLE

Some solutions for n=4

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

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

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

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

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

CROSSREFS

Sequence in context: A059606 A228950 A297203 * A231358 A000303 A298048

Adjacent sequences:  A231294 A231295 A231296 * A231298 A231299 A231300

KEYWORD

nonn

AUTHOR

R. H. Hardin, Nov 07 2013

STATUS

approved

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Last modified March 21 01:18 EDT 2019. Contains 321356 sequences. (Running on oeis4.)