A188423 Number of (8*n)Xn binary arrays with rows in nonincreasing order, 8 ones in every column and no more than 3 ones in any row

1, 9, 625, 256901, 434626896, 2259540285524

Offset

1,2

Comments

Row 8 of A188416

Links

Table of n, a(n) for n=1..6.

Example

All solutions for 16X2
..1..1....1..1....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..0....1..0....1..1....1..0....1..1....1..1
..1..1....1..0....1..1....1..0....1..0....1..1....1..0....1..1....1..1
..1..1....1..0....1..1....1..0....1..0....1..1....1..0....1..1....1..0
..1..1....1..0....1..0....1..0....1..0....1..1....1..0....1..1....1..0
..1..1....1..0....1..0....1..0....1..0....1..1....1..0....1..0....1..0
..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..0....0..1....0..1....0..1
..0..0....0..1....0..1....0..1....0..1....0..0....0..1....0..0....0..1
..0..0....0..1....0..0....0..1....0..1....0..0....0..1....0..0....0..1
..0..0....0..1....0..0....0..1....0..1....0..0....0..1....0..0....0..0
..0..0....0..0....0..0....0..1....0..1....0..0....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

Crossrefs

Sequence in context: A171703 A352276 A085530 * A158881 A188394 A157597

Adjacent sequences: A188420 A188421 A188422 * A188424 A188425 A188426

Keyword

nonn

Author

R. H. Hardin Mar 30 2011

Status

approved