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A188711 Number of 7Xn binary arrays without the pattern 0 0 diagonally or vertically 1
34, 697, 14925, 318732, 6814290, 145764780, 3118943536, 66743533552, 1428321913952, 30566631602016, 654139520133696, 13998888884058752, 299582781445141504, 6411212320129846144, 137202959280321342208 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Row 7 of A188706

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..200

FORMULA

Empirical: a(n) = 34*a(n-1) -324*a(n-2) +1264*a(n-3) -2236*a(n-4) +1816*a(n-5) -624*a(n-6) +64*a(n-7) for n>9

EXAMPLE

Some solutions for 7X3

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

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

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

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

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

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

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

CROSSREFS

Sequence in context: A020928 A061689 A166217 * A296334 A296634 A016109

Adjacent sequences:  A188708 A188709 A188710 * A188712 A188713 A188714

KEYWORD

nonn

AUTHOR

R. H. Hardin Apr 08 2011

STATUS

approved

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Last modified July 12 19:35 EDT 2020. Contains 335668 sequences. (Running on oeis4.)