The On-Line Encyclopedia of Integer Sequences (OEIS)

A188392 revision #4

A188392

T(n,k)=Number of (n*k)Xk binary arrays with rows in nonincreasing order and n ones in every column

1, 2, 1, 5, 3, 1, 15, 16, 4, 1, 52, 139, 39, 5, 1, 203, 1750, 862, 81, 6, 1, 877, 29388, 35775, 4079, 150, 7, 1, 4140, 624889, 2406208, 507549, 15791, 256, 8, 1, 21147, 16255738, 238773109, 127126912, 5442547, 52450, 410, 9, 1, 115975, 504717929, 32867762616

(list; table; graph; refs; listen; history; text; internal format)

OFFSET

1,2

COMMENTS

Table starts

.1..2...5.....15........52..........203...........877...........4140

.1..3..16....139......1750........29388........624889.......16255738

.1..4..39....862.....35775......2406208.....238773109....32867762616

.1..5..81...4079....507549....127126912...55643064708.38715666455777

.1..6.150..15791...5442547...4762077620.8738543204786

.1..7.256..52450..46757209.135029200594

.1..8.410.154279.335279744

.1..9.625.411180

.1.10.915

.1.11

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..69

EXAMPLE

All solutions for 6X2

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

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

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

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

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

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

CROSSREFS

Column 3 is A011863(n+1)

Column 4 is A175707

Row 1 is A000110

Row 2 is A020554

Row 3 is A165434

Row 4 is A165435

Row 5 is A165436

Row 6 is A165437

Sequence in context: A361654 A160185 A283424 * A356558 A143409 A197387

Adjacent sequences: A188389 A188390 A188391 * A188393 A188394 A188395

KEYWORD

nonn,tabl

AUTHOR

R. H. Hardin (rhhardin(AT)att.net) Mar 30 2011

STATUS

approved