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A208107 Number of nX7 0..1 arrays avoiding 0 0 0 and 0 1 0 horizontally and 0 1 1 and 1 1 0 vertically 1
40, 1600, 6016, 25555, 134160, 768544, 4747545, 30461016, 200679160, 1341923275, 9060096280, 61521142072, 419255546841, 2863417898992, 19583147331312, 134042927712195, 917974509748384, 6288633342628816, 43089144637765369 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 7 of A208108

LINKS

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

FORMULA

Empirical: a(n) = 11*a(n-1) -17*a(n-2) -124*a(n-3) +276*a(n-4) +396*a(n-5) -902*a(n-6) -462*a(n-7) +946*a(n-8) +220*a(n-9) -340*a(n-10) -44*a(n-11) +39*a(n-12) +3*a(n-13) -a(n-14) for n>15

EXAMPLE

Some solutions for n=4

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

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

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

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

CROSSREFS

Sequence in context: A209223 A207692 A207927 * A207728 A207598 A208117

Adjacent sequences:  A208104 A208105 A208106 * A208108 A208109 A208110

KEYWORD

nonn

AUTHOR

R. H. Hardin Feb 23 2012

STATUS

approved

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Last modified October 18 08:27 EDT 2021. Contains 348067 sequences. (Running on oeis4.)