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A185464 Number of (n+1)X7 binary arrays with no 2X2 subblock determinant equal to any horizontal or vertical neighbor 2X2 subblock determinant 1
1320, 4452, 27102, 231636, 1388736, 11083678, 63886624, 505270226, 2903085730, 22962813645, 131933531918, 1043538136278, 5995683878222, 47423208533485, 272471604500138, 2155131419283957, 12382379727663458, 97939214947579914 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 6 of A185467

LINKS

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

FORMULA

Empirical: a(n)=38*a(n-2)+285*a(n-4)+2258*a(n-6)+6967*a(n-8)+24960*a(n-10)-27398*a(n-12)+34950*a(n-14)+8534*a(n-16)+1567*a(n-18)-849*a(n-20)-665*a(n-22)-470*a(n-24)+862*a(n-26)+264*a(n-28)+24*a(n-30) for n>36

EXAMPLE

Some solutions for 3X7

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

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

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

CROSSREFS

Sequence in context: A260839 A157266 A069737 * A323802 A161586 A013641

Adjacent sequences:  A185461 A185462 A185463 * A185465 A185466 A185467

KEYWORD

nonn

AUTHOR

R. H. Hardin Jan 28 2011

STATUS

approved

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Last modified October 19 23:51 EDT 2021. Contains 348095 sequences. (Running on oeis4.)