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 A204543 Number of (n+1)X2 0..1 arrays with permanents of 2X2 subblocks differing from neighboring permanents 1
 16, 26, 41, 56, 80, 112, 162, 224, 322, 448, 646, 896, 1290, 1792, 2582, 3584, 5162, 7168, 10326, 14336, 20650, 28672, 41302, 57344, 82602, 114688, 165206, 229376, 330410, 458752, 660822, 917504, 1321642, 1835008, 2643286, 3670016, 5286570 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 LINKS R. H. Hardin, Table of n, a(n) for n = 1..210 FORMULA Empirical: a(n) = a(n-2) +2*a(n-4) for n>6 Empirical: a(2k)=14*2^k for k>1 EXAMPLE Some solutions for n=8 ..1..1....1..1....1..1....0..0....0..1....0..0....1..1....1..0....0..1....1..0 ..1..0....0..1....1..0....0..1....1..0....1..1....1..0....1..0....1..0....0..1 ..1..0....0..1....1..0....1..1....1..0....0..1....1..0....1..1....1..0....0..1 ..1..1....1..1....0..1....1..1....0..1....0..1....0..1....1..1....1..1....1..0 ..1..1....1..1....0..1....1..0....0..1....1..1....0..1....1..0....1..1....1..0 ..0..1....0..1....1..1....1..0....1..1....1..1....1..1....1..0....0..1....0..1 ..0..1....0..1....1..1....0..1....1..1....0..1....1..1....1..1....0..1....0..1 ..1..0....1..0....0..1....0..1....0..1....0..1....1..0....1..1....1..1....1..1 ..1..0....0..0....0..1....1..0....0..0....1..1....0..0....1..0....0..0....0..0 CROSSREFS Even terms are A005009(n/2+1) for n>=4 Sequence in context: A267764 A264588 A171144 * A155549 A064420 A038353 Adjacent sequences:  A204540 A204541 A204542 * A204544 A204545 A204546 KEYWORD nonn AUTHOR R. H. Hardin Jan 16 2012 STATUS approved

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