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A202097 Number of (n+2)X7 binary arrays avoiding patterns 001 and 011 in rows and columns 2
3000, 22500, 105000, 490000, 1715000, 6002500, 17287200, 49787136, 124467840, 311169600, 698544000, 1568160000, 3234330000, 6670805625, 12847477500, 24743290000, 45032787800, 81959673796, 142244061960, 246869859600 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 5 of A202100

LINKS

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

FORMULA

Empirical: a(n) = 2*a(n-1) +12*a(n-2) -26*a(n-3) -65*a(n-4) +156*a(n-5) +208*a(n-6) -572*a(n-7) -429*a(n-8) +1430*a(n-9) +572*a(n-10) -2574*a(n-11) -429*a(n-12) +3432*a(n-13) -3432*a(n-15) +429*a(n-16) +2574*a(n-17) -572*a(n-18) -1430*a(n-19) +429*a(n-20) +572*a(n-21) -208*a(n-22) -156*a(n-23) +65*a(n-24) +26*a(n-25) -12*a(n-26) -2*a(n-27) +a(n-28)

EXAMPLE

Some solutions for n=2

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

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

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

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

CROSSREFS

Sequence in context: A158861 A329169 A236982 * A229782 A269885 A269764

Adjacent sequences:  A202094 A202095 A202096 * A202098 A202099 A202100

KEYWORD

nonn

AUTHOR

R. H. Hardin Dec 11 2011

STATUS

approved

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Last modified February 19 09:33 EST 2020. Contains 332041 sequences. (Running on oeis4.)