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 A224739 Number of (n+1) X 3 0..1 matrices with each 2 X 2 permanent equal. 1
 38, 152, 565, 2326, 9554, 40297, 170754, 728996, 3120401, 13387658, 57499978, 247151833, 1062764258, 4571134864, 19664166357, 84599301422, 363983008394, 1566063674345, 6738231845242, 28992616966540, 124747487937041 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 LINKS R. H. Hardin, Table of n, a(n) for n = 1..210 Robert Israel, Maple-assisted proof of empirical recurrence FORMULA Empirical: a(n) = 7*a(n-1) - 7*a(n-2) - 34*a(n-3) + 59*a(n-4) + 27*a(n-5) - 87*a(n-6) + 36*a(n-7). Empirical g.f.: x*(38 - 114*x - 233*x^2 + 727*x^3 + 153*x^4 - 1083*x^5 + 504*x^6) / ((1 - x)*(1 - 5*x + 3*x^2)*(1 - 3*x^2)*(1 - x - 4*x^2)). - Colin Barker, Sep 05 2018 Empirical recurrence confirmed (see link). - Robert Israel, Jun 18 2019 EXAMPLE Some solutions for n=3: ..0..0..1....1..0..0....1..0..1....0..0..1....1..0..0....1..0..1....1..0..1 ..0..0..0....0..0..1....0..1..0....1..0..0....1..0..0....1..1..1....1..0..1 ..1..1..1....1..0..0....1..0..1....1..0..1....0..0..1....0..1..0....0..0..0 ..0..0..0....1..0..0....1..1..1....1..0..1....1..0..1....1..1..1....1..1..1 CROSSREFS Column 2 of A224745. Sequence in context: A164093 A158064 A251253 * A135176 A318625 A281208 Adjacent sequences: A224736 A224737 A224738 * A224740 A224741 A224742 KEYWORD nonn AUTHOR R. H. Hardin, Apr 17 2013 STATUS approved

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Last modified September 27 04:33 EDT 2023. Contains 365672 sequences. (Running on oeis4.)