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A202901 Number of nX3 0..1 arrays with every one equal to some NW, E or S neighbor 1
1, 14, 93, 494, 2801, 16062, 91161, 517646, 2942681, 16724094, 95039817, 540117614, 3069530009, 17444277726, 99136698537, 563399082830, 3201826086713, 18196142535870, 103409617841865, 587682198231086, 3339828270813785 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Column 3 of A202906

LINKS

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

FORMULA

Empirical: a(n) = 8*a(n-1) -17*a(n-2) +32*a(n-3) -70*a(n-4) +72*a(n-5) -24*a(n-6)

EXAMPLE

Some solutions for n=5

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

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

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

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

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

CROSSREFS

Sequence in context: A022609 A060217 A113776 * A224328 A241396 A101383

Adjacent sequences:  A202898 A202899 A202900 * A202902 A202903 A202904

KEYWORD

nonn

AUTHOR

R. H. Hardin Dec 25 2011

STATUS

approved

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Last modified December 20 21:34 EST 2014. Contains 252289 sequences.