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A185463 Number of (n+1)X6 binary arrays with no 2X2 subblock determinant equal to any horizontal or vertical neighbor 2X2 subblock determinant 1
540, 1646, 8762, 49670, 265724, 1388736, 7232746, 37562322, 195052754, 1012776710, 5258562310, 27304187370, 141772888292, 736133966262, 3822262004304, 19846499585644, 103049855165970, 535070324603120 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
Column 5 of A185467
LINKS
FORMULA
Empirical: a(n)=3*a(n-1)+6*a(n-2)+20*a(n-3)+24*a(n-4)+64*a(n-5)+107*a(n-6)+125*a(n-7)+88*a(n-8)-76*a(n-9)+63*a(n-10)+42*a(n-11)+4*a(n-12)-10*a(n-13)-6*a(n-14)+2*a(n-15) for n>21
EXAMPLE
Some solutions for 3X6
..1..1..0..1..1..1....1..1..1..1..0..1....1..0..1..0..1..0....0..1..0..1..0..1
..1..0..1..0..1..0....1..0..1..1..1..1....0..1..0..1..1..1....1..0..1..0..1..0
..1..1..0..1..0..1....1..1..0..1..0..1....0..1..1..0..1..0....1..1..0..1..0..1
CROSSREFS
Sequence in context: A253463 A255105 A298685 * A069474 A253824 A218414
KEYWORD
nonn
AUTHOR
R. H. Hardin Jan 28 2011
STATUS
approved

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Last modified February 26 22:44 EST 2024. Contains 370354 sequences. (Running on oeis4.)