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 A222804 Denominators of coefficients in asymptotic expansion of log z + psi(z+1/z), where psi is the digamma function. 3
 1, 2, 12, 2, 40, 2, 630, 2, 560, 2, 132, 2, 6006, 2, 156, 2, 19040, 2, 610470, 2, 41800, 2, 276, 2, 39468, 2, 12, 2, 15080, 2, 31150350, 2, 1180480, 2, 12, 2, 215333118, 2, 444, 2, 23993200, 2, 101072790, 2, 39560, 2, 564, 2, 63069864, 2, 132, 2, 2120, 2 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,2 REFERENCES 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. LINKS Vincenzo Librandi, Table of n, a(n) for n = 0..200 M. W. Coffey, V. de Angelis, A. Dixit, V. H. Moll, et al., The Zagier polynomials. Part II: Arithmetic properties of coefficients, 2013 EXAMPLE 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, ... MATHEMATICA 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 *) CROSSREFS Cf. A222803-A222806. Sequence in context: A263631 A010239 A320975 * A128268 A185633 A246737 Adjacent sequences:  A222801 A222802 A222803 * A222805 A222806 A222807 KEYWORD nonn,frac AUTHOR N. J. A. Sloane, Mar 10 2013 EXTENSIONS More terms from Alois P. Heinz, Mar 13 2013 STATUS approved

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Last modified May 12 03:08 EDT 2021. Contains 343810 sequences. (Running on oeis4.)