A188308 - OEIS

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A188308

Number of (n+1)X7 binary arrays with every 2X2 subblock sum equal to exactly one or two horizontal and vertical neighbor 2X2 subblock sums

1332, 71888, 1514522, 37040856, 878907878, 21615769428, 520845610752

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,1

COMMENTS

Column 6 of A188311

LINKS

Table of n, a(n) for n=1..7.

EXAMPLE

Some solutions for 3X7

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

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

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

CROSSREFS

Sequence in context: A050646 A044882 A158743 * A185494 A035862 A003907

Adjacent sequences: A188305 A188306 A188307 * A188309 A188310 A188311

KEYWORD

nonn

AUTHOR

R. H. Hardin Mar 27 2011

STATUS

approved

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