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A109165
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a(n) = 5*a(n-2) - 2*a(n-4), n >= 4.
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0
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1, 2, 5, 10, 23, 46, 105, 210, 479, 958, 2185, 4370, 9967, 19934, 45465, 90930, 207391, 414782, 946025, 1892050, 4315343, 8630686, 19684665, 39369330, 89792639, 179585278, 409593865, 819187730, 1868384047, 3736768094, 8522732505
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refs;
listen;
history;
text;
internal format)
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OFFSET
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0,2
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COMMENTS
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Floretion Algebra Multiplication Program, FAMP Code: 4kbaseksigcycsumseq[ - .25'i - .25i' + .25'ii' + .25'jj' + .25'kk' + .25'jk' + .25'kj' + .25e], sumtype: (Y[15], *, vesy)
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LINKS
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FORMULA
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G.f.: (2*x+1)/(1-5*x^2+2*x^4).
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CROSSREFS
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KEYWORD
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easy,nonn
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AUTHOR
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STATUS
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approved
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