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A013596
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Triangle of coefficients of cyclotomic polynomial Phi_n(x) (exponents in decreasing order).
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2
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1, 0, 1, -1, 1, 1, 1, 1, 1, 1, 0, 1, 1, 1, 1, 1, 1, 1, -1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 1, 1, 0, 0, 1, 0, 0, 1, 1, -1, 1, -1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, -1, 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, -1, 1, -1, 1, -1, 1, 1, -1, 0, 1, -1, 1, 0, -1, 1, 1, 0, 0, 0, 0
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OFFSET
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0,1
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COMMENTS
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We follow Maple in defining Phi_0 to be x; it could equally well be taken to be 1.
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REFERENCES
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E. R. Berlekamp, Algebraic Coding Theory, McGraw-Hill, 1968; see p. 90.
K. Ireland and M. Rosen, A Classical Introduction to Modern Number Theory, Springer, 1982, p. 194.
Z. I. Borevich and I. R. Shafarevich, Number Theory. Academic Press, NY, 1966, p. 325.
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LINKS
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Table of n, a(n) for n=0..93.
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EXAMPLE
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Phi_0 = x; Phi_1 = x-1; Phi_2 = x+1; Phi_3 = x^2+x+1; Phi_4 = x^2+1; ...
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MAPLE
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with(numtheory): [ seq(cyclotomic(n, x), n=0..48) ];
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MATHEMATICA
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Join[{1, 0}, Table[ CoefficientList[ Cyclotomic[n, x], x] // Reverse, {n, 1, 16}] // Flatten] (* Jean-François Alcover, Dec 11 2012 *)
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CROSSREFS
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Cf. A013595.
A013595 is the "increasing" version of this sequence.
Sequence in context: A072418 A128973 A176412 * A131695 A105812 A134323
Adjacent sequences: A013593 A013594 A013595 * A013597 A013598 A013599
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KEYWORD
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sign,easy,nice,tabf
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AUTHOR
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N. J. A. Sloane.
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STATUS
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approved
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