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 A181236 T(n,k)=Number of (k*n)Xn binary matrices with all row sums equal and all column sums equal 5
 2, 2, 4, 2, 8, 14, 2, 22, 182, 140, 2, 72, 3362, 49772, 4322, 2, 254, 69302, 33235358, 113400002, 434542, 2, 926, 1513514, 27896484332, 5210265060002, 4027811102702, 144109562, 2, 3434, 34306274, 26012734507190, 298289608088472002 (list; table; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Table starts ............2...................2....................2..................2 ............4...................8...................22.................72 ...........14.................182.................3362..............69302 ..........140...............49772.............33235358........27896484332 .........4322...........113400002........5210265060002.298289608088472002 .......434542.......4027811102702.90698868503010138802................... ....144109562.1237505791330809002........................................ .165431317452............................................................ LINKS R. H. Hardin, Table of n, a(n) for n=1..41 EXAMPLE All solutions for 6X2 ..0..0....0..1....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....1..0....1..0....1..0....1..0....1..0 ..0..0....0..1....1..0....1..0....1..0....0..1....0..1....0..1....1..0....1..0 ..0..0....1..0....0..1....1..0....1..0....0..1....1..0....1..0....0..1....0..1 ..0..0....1..0....1..0....1..0....0..1....1..0....1..0....0..1....1..0....0..1 ..0..0....1..0....1..0....0..1....1..0....1..0....0..1....1..0....0..1....1..0 ... ..0..1....1..0....1..0....1..0....1..0....1..0....1..0....1..0....1..0....1..0 ..1..0....0..1....0..1....0..1....0..1....0..1....0..1....1..0....1..0....1..0 ..1..0....0..1....0..1....0..1....1..0....1..0....1..0....0..1....0..1....0..1 ..1..0....0..1....1..0....1..0....0..1....0..1....1..0....0..1....0..1....1..0 ..0..1....1..0....1..0....0..1....1..0....0..1....0..1....1..0....0..1....0..1 ..0..1....1..0....0..1....1..0....0..1....1..0....0..1....0..1....1..0....0..1 ... ..1..0....1..1 ..1..0....1..1 ..1..0....1..1 ..0..1....1..1 ..0..1....1..1 ..0..1....1..1 CROSSREFS Column 1 is A067209 Row 2 is twice A112849 Sequence in context: A131999 A103178 A173300 * A087909 A076078 A053204 Adjacent sequences:  A181233 A181234 A181235 * A181237 A181238 A181239 KEYWORD nonn,tabl AUTHOR R. H. Hardin Oct 10 2010 STATUS approved

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