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 A238182 Decimal expansion of sum_(n>=1) H(n)^2/n^4 where H(n) is the n-th harmonic number (Quadratic Euler Sum S(2,4)). 3
 1, 2, 2, 1, 8, 7, 9, 9, 4, 5, 3, 1, 9, 8, 8, 0, 1, 3, 8, 5, 1, 8, 8, 0, 6, 4, 7, 5, 2, 9, 0, 9, 9, 4, 8, 1, 2, 5, 6, 9, 0, 4, 1, 5, 4, 4, 0, 2, 1, 6, 7, 2, 4, 6, 4, 1, 8, 3, 5, 3, 3, 3, 5, 9, 8, 8, 7, 0, 0, 8, 1, 9, 3, 6, 3, 2, 7, 0, 4, 9, 6, 6, 6, 7, 7, 1, 5, 8, 6, 3, 0, 4, 6, 4, 5, 4, 4, 6, 8, 6 (list; constant; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 COMMENTS No closed form of S(2,2q) is known to date, except for S(2,2) (A218505) and S(2,4) (this sequence). LINKS Philippe Flajolet, Bruno Salvy, Euler Sums and Contour Integral Representations, Experimental Mathematics 7:1 (1998) page 24. FORMULA 97/24*zeta(6) - 2*zeta(3)^2. EXAMPLE 1.221879945319880138518806475290994812569... MATHEMATICA 97/24*Zeta[6] - 2*Zeta[3]^2 // RealDigits[#, 10, 100]& // First CROSSREFS Cf. A152648, A152649, A152651, A218505, A238168, A238181, A238183. Sequence in context: A121350 A198569 A135080 * A117260 A077944 A077992 Adjacent sequences:  A238179 A238180 A238181 * A238183 A238184 A238185 KEYWORD nonn,cons AUTHOR Jean-François Alcover, Feb 19 2014 STATUS approved

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Last modified October 19 04:40 EDT 2019. Contains 328211 sequences. (Running on oeis4.)