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A210627 Constants r_n arising in study of polynomials of least deviation from zero in several variables. 0
72, 896, 14400, 283392, 6598144, 177373184, 5406289920, 184223744000, 6939874934784, 286375842938880, 12846564299505664, 622448445155704832, 32395710363284275200, 1802446793652649852928, 106760825994912064339968, 6707088257932303257305088, 445456559121345605093294080, 31185504805980142781333504000 (list; graph; refs; listen; history; text; internal format)
OFFSET

3,1

LINKS

Table of n, a(n) for n=3..20.

Yuan Xu, On polynomials of least deviation from zero in several variables, J. Experimental Math. 13 (2004), 103-112.

FORMULA

For n>3, r_n = n*Sum_{k=4..n} k^(n-3) binomial(n,k) [(-1)^k(9k^2-32k+24)+k^2].

Conjecture: a(n) = n*A038049(n). - R. J. Mathar, Mar 27 2012

CROSSREFS

Sequence in context: A113855 A082949 A240983 * A019562 A250423 A250650

Adjacent sequences:  A210624 A210625 A210626 * A210628 A210629 A210630

KEYWORD

nonn

AUTHOR

N. J. A. Sloane, Mar 25 2012

STATUS

approved

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Last modified October 21 14:29 EDT 2019. Contains 328301 sequences. (Running on oeis4.)