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 A293107 Irregular triangle read by rows: universal linear relationships among polynomial means for even degrees. 1
 5, -6, 1, 77, -120, 60, -20, 3, 669, -1260, 1050, -700, 315, -84, 10, 4609, -10080, 11760, -11760, 8820, -4704, 1680, -360, 35, 55991, -13860, 207900, -277200, 291060, -232848, 138600, -59400, 17325, -3080, 252, 785633, -2162160, 3963960, -6606600, 8918910 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Irregular triangular array of coefficients of universal linear relationships among means of all even-degree (complex-valued) polynomials, beginning with degree = 4 at top of triangle. Let phi(D,d,r) denote the mean of a generic degree D polynomial's order d derivative averaged over the (D-r) roots of the order r derivative of the polynomial. The tabulated coefficients, c(-), satisfy Sum_{k=1..(D-d-1)} c(k)*phi(D,d,k) = 0, with d always equal to 0. The first row of the triangle has 3 entries, while each subsequent row has an additional 2 entries. Results have been computed in all degrees up to D=49, observing: (1) in all even degrees beyond 2, there is a single such linear relationship; (2) in all odd degrees beyond 3, there is a 2-dimensional family of such linear relationships. In each row of the triangle, the sum of all positive coefficients equals the sum of all negative coefficients. LINKS G. G. Wojnar, D. Sz. Wojnar, and L. Q. Brin, Universal Peculiar Linear Mean Relationships in All Polynomials, arXiv:1706.08381 [math.GM], 2017. EXAMPLE Triangle begins:      5,     -6,     1;     77,   -120,    60,    -20,    3;    669,  -1260,  1050,   -700,  315,   -84,   10;   4609, -10080, 11760, -11760, 8820, -4704, 1680, -360, 35;   ... Example 1: For any polynomial of degree D=4, it holds that 5*phi(4,0,1) - 6*phi(4,0,2) + 1*phi(4,0,3) = 0. Example 2: For any polynomial of degree D=6, it holds that 77*phi(6,0,1) - 120*phi(6,0,2) + 60*phi(6,0,3) - 20*phi(6,0,4) + 3*phi(6,0,5) = 0. CROSSREFS Sequence in context: A086646 A181612 A216808 * A113106 A171273 A157832 Adjacent sequences:  A293104 A293105 A293106 * A293108 A293109 A293110 KEYWORD sign,tabf AUTHOR Gregory Gerard Wojnar, Sep 30 2017 STATUS approved

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Last modified August 11 20:13 EDT 2022. Contains 356067 sequences. (Running on oeis4.)