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 A052182 Determinant of n X n matrix whose rows are cyclic permutations of 1..n. 19

%I

%S 1,-3,18,-160,1875,-27216,470596,-9437184,215233605,-5500000000,

%T 155624547606,-4829554409472,163086595857367,-5952860799406080,

%U 233543408203125000,-9799832789158199296,437950726881001816329,-20766159817517617053696,1041273502979112415328410

%N Determinant of n X n matrix whose rows are cyclic permutations of 1..n.

%C Each row is a cyclic shift to the right by one place of the previous row. See the example below. - _N. J. A. Sloane_, Jan 07 2019

%C |a(n)| = number of labeled mappings from n points to themselves (endofunctions) with an odd number of cycles. - _Vladeta Jovovic_, Mar 30 2006

%C |a(n)| = number of functions from {1,2,...,n}->{1,2,...,n} such that of all recurrent elements the least is always mapped to the greatest. - _Geoffrey Critzer_, Aug 29 2013

%H T. D. Noe, <a href="/A052182/b052182.txt">Table of n, a(n) for n = 1..100</a>

%H P. J. Cameron and P. Cara, <a href="http://dx.doi.org/10.1016/S0021-8693(02)00550-1">Independent generating sets and geometries for symmetric groups</a>, J. Algebra, Vol. 258, no. 2 (2002), 641-650.

%F a(n) = (-1)^(n-1) * n^(n-2) * (n^2 + n)/2.

%F E.g.f.[A052182] = E.g.f.[A000312] * E.g.f.[A000272], so A052182(unsigned) is "tree-like". E.g.f.: (T-T^2/2)/(1-T), where T=T(x) is Euler's tree function (see A000169). E.g.f. for signed sequence: (W+W^2/2)/(1+W), where W=W(x)=-T(-x) is the Lambert W function. - _Len Smiley_, Dec 13 2001

%F Conjecture: a(n) = -Res( f(n), x^n - 1), where Res is the resultant and f(n) = Sum_{k=1..n} k*x^k. - _Benedict W. J. Irwin_, Dec 07 2016

%e a(3) = 18 because this is the determinant of [(1,2,3), (3,1,2), (2,3,1) ].

%p 1,seq(LinearAlgebra:-Determinant(Matrix(n,shape=Circulant[\$1..n])),n=2..30); # _Robert Israel_, Aug 31 2014

%t f[n_] := Det[ Table[ RotateLeft[ Range@ n, -j], {j, 0, n - 1}]]; Array[f, 19] (* or *)

%t f[n_] := (-1)^(n - 1)*n^(n - 2)*(n^2 + n)/2; Array[f, 19]

%t (* _Robert G. Wilson v_, Aug 31 2014 *)

%o (MuPAD) (1+n)^(n-1)*binomial(n+2,n)*(-1)^(n) \$ n=0..16 // _Zerinvary Lajos_, Apr 01 2007

%o (PARI) a(n) = (n+1)*(-n)^(n-1)/2; \\ _Altug Alkan_, Dec 17 2017

%Y Cf. A000312, A070896, A060281, A060435.

%K easy,sign,nice

%O 1,2

%A Henry M. Gunn High School Mathematical Circle (_Joshua Zucker_), Jan 26 2000

%E More terms from _James A. Sellers_, Jan 31 2000

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Last modified November 12 19:33 EST 2019. Contains 329078 sequences. (Running on oeis4.)