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A086848
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First differences are formed by interleaving {2^k - 1, k = 1, 2, 3, ...} and {11*k, k = 5, 4, 3, ...}.
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3
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42, 43, 98, 101, 145, 152, 185, 200, 222, 253, 264, 327, 327, 454, 443, 698, 676, 1187, 1154, 2177, 2133, 4180, 4125, 8220, 8154, 16345, 16268, 32651, 32563, 65330, 65231, 130766, 130656, 261727, 261606, 523749, 523617, 1047904
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OFFSET
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1,1
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COMMENTS
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A version of this was given as a puzzle somewhere.
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LINKS
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FORMULA
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Empirical g.f.: x*(48*x^6+34*x^4-x^3-113*x^2+x+42) / ((x-1)^3*(x+1)^2*(2*x^2-1)). - Colin Barker, Mar 05 2013
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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Michael M. Taylor, Aug 09 2003
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STATUS
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approved
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