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A164658 Numerators of coefficients of integrated Chebyshev polynomials T(n,x) (in increasing order of powers of x). 6

%I #17 Feb 10 2023 10:01:48

%S 1,0,1,-1,0,2,0,-3,0,1,1,0,-8,0,8,0,5,0,-5,0,8,-1,0,6,0,-48,0,32,0,-7,

%T 0,14,0,-56,0,8,1,0,-32,0,32,0,-256,0,128,0,9,0,-30,0,72,0,-72,0,128,

%U -1,0,50,0,-80,0,160,0,-1280,0,512,0,-11,0,55,0,-616,0,352,0,-1408,0,256,1,0,-24,0,168,0,-512,0,768

%N Numerators of coefficients of integrated Chebyshev polynomials T(n,x) (in increasing order of powers of x).

%C The denominators are given in A164659.

%C The column m of the rational triangle A164658/A164659 when multiplied by m/2^(m-2) becomes (with shifted offset) the column nr. m-1 divided by 2^(m-1) of the Chebyshev T-triangle A053120 for m=1,2,3,...

%H Wolfdieter Lang, <a href="/A164658/a164658.txt">First eleven rows of the rational coefficients</a>.

%H <a href="/index/Ch#Cheby">Index entries for sequences related to Chebyshev polynomials</a>.

%F a(n,m) = numerator(b(n,m)), with int(T(n,x))= sum(b(n,m)*x^m,m=1..n+1), n>=0, where T(n,x) are Chebyshevs polynomials of the first kind.

%e Rationals a(n,m)/A164659(n,m) = [1], [0, 1/2], [-1, 0, 2/3], [0, -3/2, 0, 1], [1, 0, -8/3, 0, 8/5],...

%t row[n_] := CoefficientList[Integrate[ChebyshevT[n, x], x], x] // Rest // Numerator; Table[row[n], {n, 0, 12}] // Flatten (* _Jean-François Alcover_, Oct 06 2016 *)

%Y Row sums of triangle give A164662.

%Y A053120: coefficients of T-polynomials.

%Y Row sums of rational triangle A164658/A164659 are given by A164660/A164661.

%K sign,frac,tabl,easy

%O 0,6

%A _Wolfdieter Lang_, Oct 16 2009

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Last modified April 25 13:02 EDT 2024. Contains 371969 sequences. (Running on oeis4.)