A188393 - OEIS

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A188393

Number of (7*n) X n binary arrays with rows in nonincreasing order and 7 ones in every column.

1, 8, 410, 154279, 335279744, 3037611501499, 85864898797026630, 6108049486793195602061, 940799711096710781211340486, 282034644651263093966900548272466, 152112222253533154849862379093617650250, 138939503191252353429488898422015410111981523 (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 14 X 2:` `..1..1....1..0....1..1....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..0....1..1....1..0....1..0....1..1....1..1....1..1` `..1..1....1..0....1..1....1..0....1..0....1..1....1..0....1..1` `..1..1....1..0....1..0....1..0....1..0....1..1....1..0....1..1` `..1..1....1..0....1..0....1..0....1..0....1..1....1..0....1..0` `..1..1....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..0....0..1....0..1....0..1....0..1....0..0....0..1....0..1` `..0..0....0..1....0..1....0..1....0..1....0..0....0..1....0..0` `..0..0....0..1....0..0....0..1....0..1....0..0....0..1....0..0` `..0..0....0..1....0..0....0..1....0..1....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..1....0..0....0..0....0..0....0..0....0..0....0..0`
	CROSSREFS	`Row 7 of A188392.` `Sequence in context: A015091 A008274 A188422 * A267162 A193372 A185833` `Adjacent sequences: A188390 A188391 A188392 * A188394 A188395 A188396`
	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 March 22 01:15 EDT 2023. Contains 361413 sequences. (Running on oeis4.)