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A231265 Number of (3+1)X(n+1) 0..2 arrays with no element unequal to a strict majority of its horizontal and antidiagonal neighbors, with values 0..2 introduced in row major order 1
22, 89, 304, 1253, 5109, 21894, 94234, 411978, 1804685, 7941968, 34969518, 154177482, 679856170, 2999022193, 13230140405, 58371368067, 257539346061, 1136325839478, 5013778949950, 22122400344087, 97611358054570 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Row 3 of A231263

LINKS

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

FORMULA

Empirical: a(n) = 9*a(n-1) -20*a(n-2) -36*a(n-3) +220*a(n-4) -282*a(n-5) -226*a(n-6) +1107*a(n-7) -1331*a(n-8) +254*a(n-9) +1022*a(n-10) -257*a(n-11) -2156*a(n-12) +2602*a(n-13) +2385*a(n-14) -8433*a(n-15) +7492*a(n-16) -959*a(n-17) -1626*a(n-18) -531*a(n-19) -3536*a(n-20) +3860*a(n-21) -2019*a(n-22) +4258*a(n-23) -1660*a(n-24) +328*a(n-25) -368*a(n-26) -96*a(n-27) for n>28

EXAMPLE

Some solutions for n=3

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

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

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

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

CROSSREFS

Sequence in context: A195323 A041940 A041942 * A041944 A230357 A145769

Adjacent sequences:  A231262 A231263 A231264 * A231266 A231267 A231268

KEYWORD

nonn

AUTHOR

R. H. Hardin, Nov 06 2013

STATUS

approved

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Last modified September 29 04:06 EDT 2020. Contains 337420 sequences. (Running on oeis4.)