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A221960 Triangle read by rows giving coefficients of polynomials arising in enumeration of multigraphs. 0

%I

%S 1,1,-1,1,0,-3,2,1,0,0,-4,-3,12,-6,1,0,0,0,-5,-10,20,30,-60,24,1,0,0,

%T 0,0,-6,-15,20,120,-90,-270,360,-120

%N Triangle read by rows giving coefficients of polynomials arising in enumeration of multigraphs.

%H Christian Brouder, William J. Keith, Ângela Mestre, <a href="http://arxiv.org/abs/1301.0874">Closed forms for a multigraph enumeration</a>, arXiv preprint arXiv:1301.0874, 2013.

%e Triangle begins

%e 1,

%e 1, -1,

%e 1, 0, -3, 2,

%e 1, 0, 0, -4, -3, 12, -6,

%e 1, 0, 0, 0, -5, -10, 20, 30, -60, 24,

%e 1, 0, 0, 0, 0, -6, -15, 20, 120, -90, -270, 360, -120,

%e ...

%K sign,tabf,more

%O 1,6

%A _N. J. A. Sloane_, Feb 04 2013

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Last modified October 15 18:40 EDT 2021. Contains 348033 sequences. (Running on oeis4.)