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A267248 Number of 5Xn binary arrays with row sums nondecreasing and columns lexicographically nondecreasing. 0
6, 63, 486, 3351, 20040, 107015, 516084, 2278687, 9303052, 35428544, 126753732, 428651446, 1377310514, 4223642819, 12409437728, 35050866249, 95459908872, 251341796912, 641282264972, 1588863292072 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Row 5 of A267245.

LINKS

Table of n, a(n) for n=1..20.

EXAMPLE

Some solutions for n=4

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

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

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

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

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

CROSSREFS

Cf. A267245.

Sequence in context: A296393 A123615 A245754 * A053535 A268220 A272495

Adjacent sequences:  A267245 A267246 A267247 * A267249 A267250 A267251

KEYWORD

nonn

AUTHOR

R. H. Hardin, Jan 12 2016

STATUS

approved

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Last modified May 13 02:36 EDT 2021. Contains 343836 sequences. (Running on oeis4.)