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A225899

Number of nX7 binary arrays whose sum with another nX7 binary array containing no more than a single 1 has rows and columns in lexicographically nondecreasing order.

29, 527, 12910, 396804, 13135919, 415506534, 11798042714, 293929504271, 6410647528344, 123230963555568, 2108540231577387, 32445522511325004, 453328739037902357, 5800810253342331239, 68494482714581515641

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

OFFSET

1,1

COMMENTS

Column 7 of A225900

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..67

EXAMPLE

Some solutions for n=3

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

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

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