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A188394 Number of (8*n) X n binary arrays with rows in nonincreasing order and 8 ones in every column. 1
1, 9, 625, 411180, 2067951459, 56145844958803, 5878897478976883089, 1831628658711424019558504, 1413561739206881774907508536243, 2374109597657754735102006133988615563, 7893915426933380799680357236645251399639715, 48348427353106609781034833166459980023688120512638 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Table of n, a(n) for n=1..12.

EXAMPLE

All solutions for 16 X 2:

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

CROSSREFS

Row 8 of A188392.

Sequence in context: A085530 A188423 A158881 * A157597 A211611 A280904

Adjacent sequences:  A188391 A188392 A188393 * A188395 A188396 A188397

KEYWORD

nonn

AUTHOR

R. H. Hardin, Mar 30 2011

EXTENSIONS

a(7)-a(12) from Andrew Howroyd, May 17 2020

STATUS

approved

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Last modified September 27 07:56 EDT 2022. Contains 357052 sequences. (Running on oeis4.)