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A144664
Decimal expansion of Product_{n>=2} (n^5-1)/(n^5+1).
3
9, 2, 8, 7, 8, 6, 9, 3, 5, 7, 9, 9, 5, 5, 2, 4, 5, 3, 7, 5, 1, 4, 6, 9, 9, 1, 5, 6, 5, 2, 8, 5, 2, 3, 5, 1, 9, 3, 2, 0, 1, 0, 1, 5, 0, 3, 7, 5, 3, 0, 4, 1, 1, 8, 2, 0, 1, 0, 2, 8, 2, 6, 5, 1, 4, 8, 7, 2, 0, 0, 7, 3, 7, 9, 9, 1, 6, 0, 2, 2, 3, 8, 8, 2, 7, 4, 1, 5, 5, 1, 8, 1, 0, 8, 4, 1, 9, 2, 7, 8, 2, 5, 1, 0, 5, 9, 7, 2, 6, 2
OFFSET
0,1
LINKS
J. Borwein et al., Experimentation in Mathematics, 2004, section 1.2.
E. W. Weisstein, Infinite Product, MathWorld.
EXAMPLE
0.92878693579955245375146991...
MATHEMATICA
p = 2*Gamma[2-(-1)^(1/5)] * Gamma[2+(-1)^(2/5)] * Gamma[2-(-1)^(3/5)] * Gamma[2+(-1)^(4/5)] / (Gamma[2+(-1)^(1/5)] * Gamma[2-(-1)^(2/5)] * Gamma[2+(-1)^(3/5)] * Gamma[2-(-1)^(4/5)]); RealDigits[Re[p], 10, 110][[1]] (* Jean-François Alcover, Feb 11 2013, updated Nov 18 2015 *)
RealDigits[Re[N[Product[(n^5 - 1)/(n^5 + 1), {n, 2, Infinity}], 110]]][[1]] (* Bruno Berselli, Apr 02 2013 *)
CROSSREFS
Sequence in context: A011453 A125580 A086238 * A241560 A309821 A073007
KEYWORD
nonn,cons
AUTHOR
R. J. Mathar, Feb 01 2009
EXTENSIONS
More terms from Jean-François Alcover, Feb 11 2013
STATUS
approved