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A208839 Number of nX7 0..1 arrays avoiding 0 0 0 and 0 0 1 horizontally and 0 1 1 and 1 1 0 vertically 1
42, 1764, 7086, 31419, 169974, 992574, 6206445, 40122936, 265568130, 1780946115, 12045557394, 81883111842, 558396389421, 3815311552572, 26099962612902, 178677791790795, 1223770846004094, 8384018150245206, 57448693695345549 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 7 of A208840

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

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

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

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

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

CROSSREFS

Sequence in context: A208068 A207933 A207850 * A208687 A207351 A207773

Adjacent sequences:  A208836 A208837 A208838 * A208840 A208841 A208842

KEYWORD

nonn

AUTHOR

R. H. Hardin Mar 01 2012

STATUS

approved

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Last modified January 17 23:51 EST 2022. Contains 350410 sequences. (Running on oeis4.)