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A184068 Number of (n+1)X7 binary arrays with rows and columns in nondecreasing order and with no 2X2 subblock sum differing from a horizontal or vertical neighbor subblock sum by more than one 1
81, 225, 1884, 22452, 288744, 2663589, 19694227, 116690636, 572683182, 2305864084, 7782298646, 22382616957, 56141874238, 124734871342, 249667791032, 456693083041, 773758373131, 1229106077318, 1850219475619, 2663743231907 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 6 of A184071

LINKS

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

EXAMPLE

Some solutions for 3X7

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

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

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

...

...1..2..2..3..4..4.......1..2..2..2..2..3.......0..1..2..2..2..2...

...2..2..2..3..4..4.......2..2..1..1..2..2.......1..2..2..1..1..2...

CROSSREFS

Sequence in context: A255110 A062532 A075730 * A211690 A205055 A335843

Adjacent sequences:  A184065 A184066 A184067 * A184069 A184070 A184071

KEYWORD

nonn

AUTHOR

R. H. Hardin Jan 09 2011

STATUS

approved

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Last modified October 30 17:58 EDT 2020. Contains 338090 sequences. (Running on oeis4.)