A188418 - OEIS

A188418

Number of (3*n)Xn binary arrays with rows in nonincreasing order, 3 ones in every column and no more than 3 ones in any row

1, 4, 39, 723, 21965, 968230, 57967660, 4505774905, 439923593145, 52601045792520 (list; graph; refs; listen; history; text; internal format)

	OFFSET	`1,2`
	COMMENTS	`Row 3 of A188416`
	LINKS	`Table of n, a(n) for n=1..10.`
	EXAMPLE	`All solutions for 6X2` `..1..0....1..1....1..1....1..1` `..1..0....1..1....1..0....1..1` `..1..0....1..0....1..0....1..1` `..0..1....0..1....0..1....0..0` `..0..1....0..0....0..1....0..0` `..0..1....0..0....0..0....0..0`
	CROSSREFS	`Sequence in context: A132612 A129463 A299426 * A136653 A165434 A348118` `Adjacent sequences: A188415 A188416 A188417 * A188419 A188420 A188421`
	KEYWORD	`nonn`
	AUTHOR	`R. H. Hardin Mar 30 2011`
	STATUS	`approved`

Last modified May 21 19:42 EDT 2022. Contains 353929 sequences. (Running on oeis4.)