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A285794
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a(1)=1, a(2)=2, a(3)=3, a(n) = 3*a(n-3)+2*a(n-2)+a(n-1).
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2
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1, 2, 3, 10, 22, 51, 125, 293, 696, 1657, 3928, 9330, 22157, 52601, 124905, 296578, 704191, 1672062, 3970178, 9426875, 22383417, 53147701, 126195160, 299640813, 711474236, 1689341342, 4011212253, 9524317645, 22614766177, 53697038226, 127499523515
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OFFSET
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1,2
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LINKS
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FORMULA
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G.f.: x*(x^2-x-1)/(3*x^3+2*x^2+x-1).
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MATHEMATICA
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LinearRecurrence[{1, 2, 3}, {1, 2, 3}, 50]
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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STATUS
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approved
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