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%I #20 May 23 2014 11:07:37
%S 1,2,12,2,40,2,630,2,560,2,132,2,6006,2,156,2,19040,2,610470,2,41800,
%T 2,276,2,39468,2,12,2,15080,2,31150350,2,1180480,2,12,2,215333118,2,
%U 444,2,23993200,2,101072790,2,39560,2,564,2,63069864,2,132,2,2120,2
%N Denominators of coefficients in asymptotic expansion of log z + psi(z+1/z), where psi is the digamma function.
%D Mohammad K. Azarian, Problem 1218, Pi Mu Epsilon Journal, Vol. 13, No. 2, Spring 2010, p. 116. Solution published in Vol. 13, No. 3, Fall 2010, pp. 183-185.
%H Vincenzo Librandi, <a href="/A222804/b222804.txt">Table of n, a(n) for n = 0..200</a>
%H M. W. Coffey, V. de Angelis, A. Dixit, V. H. Moll, et al., <a href="http://www.tulane.edu/~vhm/papers_html/val-zagier.pdf">The Zagier polynomials. Part II: Arithmetic properties of coefficients</a>, 2013
%e 0, -1/2, 11/12, 1/2, -13/40, -1/2, 29/630, 1/2, 109/560, -1/2, -67/132, 1/2, 6571/6006, ...
%t s = Series[Log[z] + PolyGamma[z+1/z], {z, Infinity, 53}] // Normal; CoefficientList[s + 2*Log[1/z], 1/z] // Denominator (* _Jean-François Alcover_, Mar 07 2014 *)
%Y Cf. A222803-A222806.
%K nonn,frac
%O 0,2
%A _N. J. A. Sloane_, Mar 10 2013
%E More terms from _Alois P. Heinz_, Mar 13 2013
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