A140815 Irregular triangle read by rows: the n-th row gives the coefficients of Phi(n, 1-x), where Phi(n, x) is the n-th cyclotomic polynomial.

-1, 0, -1, 2, 1, -3, 3, 1, -2, 2, 1, -5, 10, -10, 5, 1, -1, 1, 1, -7, 21, -35, 35, -21, 7, 1, -4, 6, -4, 2, 1, -6, 15, -21, 18, -9, 3, 1, -3, 4, -2, 1, 1, -11, 55, -165, 330, -462, 462, -330, 165, -55, 11, 1, -4, 5, -2, 1, 1, -13, 78, -286, 715, -1287, 1716, -1716, 1287, -715, 286, -78, 13, 1, -5, 11, -13, 9, -3, 1, 1, -7, 21

Offset

1,4

Links

Table of n, a(n) for n=1..81.

Formula

t(n,m) = Coefficients(Cyclotomic(n,1-x)).

Prog

(PARI) row(n)=Vec(polcyclo(n, 1-x)); \\ Joerg Arndt, Feb 26 2018

Crossrefs

Cf. A136093, A136247.

Sequence in context: A195916 A245554 A110569 * A365958 A351963 A134840

Adjacent sequences: A140812 A140813 A140814 * A140816 A140817 A140818

Keyword

tabf,sign,easy,less

Author

Roger L. Bagula and Gary W. Adamson, Jul 16 2008

Extensions

Corrected and edited by Joerg Arndt, Feb 26 2018

Status

approved