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 A184595 1/4 the number of (n+1) X (n+1) binary arrays with equal numbers of 2 X 2 subblocks with sums 1 and 3. 0
 2, 24, 1986, 782948, 1291076970, 8783684627835, 245608218357699105, 28056029360014523631654, 13030390694954764597618159782 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Diagonal of A184604. LINKS EXAMPLE Some solutions for 3 X 3: ..1..0..0....0..0..1....0..1..1....1..1..1....1..0..0....1..0..0....1..1..1 ..1..1..0....1..1..0....1..0..0....1..0..0....1..0..1....1..0..1....0..0..0 ..1..0..0....1..1..0....0..1..1....0..1..0....1..1..0....0..1..1....1..1..1 CROSSREFS Sequence in context: A280922 A296589 A053995 * A262206 A240993 A007079 Adjacent sequences:  A184592 A184593 A184594 * A184596 A184597 A184598 KEYWORD nonn AUTHOR R. H. Hardin, Jan 18 2011 STATUS approved

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Last modified May 14 16:48 EDT 2021. Contains 343898 sequences. (Running on oeis4.)