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A188448 T(n,k)=Number of (n*k)Xk binary arrays with nonzero rows in decreasing order, no more than 2 ones in any row and exactly n ones in every column 1
1, 2, 0, 4, 1, 0, 10, 4, 0, 0, 26, 18, 1, 0, 0, 76, 112, 10, 0, 0, 0, 232, 820, 112, 1, 0, 0, 0, 764, 6912, 1760, 26, 0, 0, 0, 0, 2620, 66178, 35150, 820, 1, 0, 0, 0, 0, 9496, 708256, 848932, 35150, 76, 0, 0, 0, 0, 0, 35696, 8372754, 24243520, 1944530, 6912, 1, 0, 0, 0, 0 (list; table; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Table starts

.1.2.4.10..26...76...232.....764......2620........9496.........35696

.0.1.4.18.112..820..6912...66178....708256.....8372754.....108306280

.0.0.1.10.112.1760.35150..848932..24243520...805036704...30649435140

.0.0.0..1..26..820.35150.1944530.133948836.11234051976.1127512146540

.0.0.0..0...1...76..6912..848932.133948836.26615510712

.0.0.0..0...0....1...232...66178..24243520

.0.0.0..0...0....0.....1.....764

.0.0.0..0...0....0.....0

.0.0.0..0...0....0

.0.0.0..0...0

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..108

EXAMPLE

All solutions for 9X3

..1..1..0

..1..0..1

..1..0..0

..0..1..1

..0..1..0

..0..0..1

..0..0..0

..0..0..0

..0..0..0

CROSSREFS

Row 1 is A000085

Row 2 is A000986

Row 3 is A110040

Row 4 is A139670

Row 5 is A139671

Row 6 is A139673

Row 7 is A139674

Row 8 is A139675

Sequence in context: A056859 A272098 A291929 * A264379 A090888 A154794

Adjacent sequences:  A188445 A188446 A188447 * A188449 A188450 A188451

KEYWORD

nonn,tabl

AUTHOR

R. H. Hardin Mar 31 2011

STATUS

approved

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Last modified February 25 13:30 EST 2018. Contains 299654 sequences. (Running on oeis4.)