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A213432
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a(n) = 2^(n-3)*binomial(n,4).
(Formerly N0837)
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1
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0, 0, 0, 0, 2, 20, 120, 560, 2240, 8064, 26880, 84480, 253440, 732160, 2050048, 5591040, 14909440, 38993920, 100270080, 254017536, 635043840, 1568931840, 3835166720, 9285140480, 22284337152, 53057945600, 125409689600, 294440140800, 687026995200, 1593902628864, 3678236835840, 8446321623040, 19305877995520, 43937515438080, 99591701659648
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OFFSET
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0,5
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REFERENCES
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N. J. A. Sloane, A Handbook of Integer Sequences, Academic Press, 1973 (includes this sequence).
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LINKS
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FORMULA
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MATHEMATICA
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LinearRecurrence[{10, -40, 80, -80, 32}, {0, 0, 0, 0, 2}, 35] (* Paolo Xausa, Feb 22 2024 *)
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CROSSREFS
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KEYWORD
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nonn,easy
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AUTHOR
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STATUS
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approved
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