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A115953
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Periodic {1,-1,0,0,1,-2,1,0,0,-1,1,-1}.
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1
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1, -1, 0, 0, 1, -2, 1, 0, 0, -1, 1, -1, 1, -1, 0, 0, 1, -2, 1, 0, 0, -1, 1, -1, 1, -1, 0, 0, 1, -2, 1, 0, 0, -1, 1, -1, 1, -1, 0, 0, 1, -2, 1, 0, 0, -1, 1, -1, 1, -1, 0, 0, 1, -2, 1, 0, 0, -1, 1, -1, 1, -1, 0, 0, 1, -2, 1, 0, 0, -1, 1, -1
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OFFSET
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0,6
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COMMENTS
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Diagonal sums of number triangle A115952.
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LINKS
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FORMULA
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G.f.: (1-x^3-x^5)/((1-x^3)(1+x+x^2+x^3))
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MATHEMATICA
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LinearRecurrence[{-1, -1, 0, 1, 1, 1}, {1, -1, 0, 0, 1, -2}, 80] (* or *) PadRight[{}, 80, {1, -1, 0, 0, 1, -2, 1, 0, 0, -1, 1, -1}] (* Harvey P. Dale, Jan 28 2023 *)
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CROSSREFS
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KEYWORD
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easy,sign
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AUTHOR
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STATUS
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approved
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