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A185766 Number of (n+1)X7 binary arrays with no 2X2 subblock trace equal to any horizontal or vertical neighbor 2X2 subblock trace 1
1736, 10592, 75192, 562800, 4430912, 35108016, 278758936, 2212654240, 17567479016, 139478572544, 1107370142640, 8792101180232, 69804143650776, 554214418338440, 4400166223484904, 34935244761367808, 277367986882503912 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 6 of A185769

LINKS

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

FORMULA

Empirical: a(n)=a(n-1)+54*a(n-2)+60*a(n-3)-400*a(n-4)-155*a(n-5)+924*a(n-6)-1220*a(n-7)-76*a(n-8)+1725*a(n-9)-642*a(n-10)-412*a(n-11)-88*a(n-12)+100*a(n-13)+40*a(n-14) for n>18

EXAMPLE

Some solutions for 3X7

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

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

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

CROSSREFS

Sequence in context: A253696 A253703 A235014 * A179160 A043653 A194775

Adjacent sequences:  A185763 A185764 A185765 * A185767 A185768 A185769

KEYWORD

nonn

AUTHOR

R. H. Hardin Feb 03 2011

STATUS

approved

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Last modified July 5 04:45 EDT 2022. Contains 355087 sequences. (Running on oeis4.)