A385423 Decimal expansion of the absolute value of zeta(1/5).
7, 3, 3, 9, 2, 0, 9, 2, 4, 8, 9, 6, 3, 4, 0, 5, 9, 2, 2, 4, 3, 8, 0, 9, 6, 1, 3, 7, 5, 5, 1, 3, 6, 8, 6, 6, 6, 4, 9, 1, 2, 8, 6, 9, 3, 8, 3, 2, 3, 1, 5, 3, 3, 6, 4, 4, 3, 9, 2, 6, 2, 4, 0, 6, 0, 9, 1, 6, 4, 9, 7, 8, 7, 4, 4, 6, 4, 1, 0, 8, 2, 5, 9, 3, 8, 5, 7, 5, 4, 9, 4, 3, 7, 9, 8, 5, 7, 3, 7, 6, 2, 6, 9, 7, 9
Offset: 0
Examples
0.7339209248963405922438096137551368666491286938...
Programs
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Maple
evalf(abs(Zeta(1/5)), 120); # Alois P. Heinz, Jul 26 2025
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Mathematica
RealDigits[-Zeta[1/5], 10, 105][[1]]
Formula
Equals (1/(2^(4/5)-1))*Sum_{k>=1} (-1)^(k+1)/k^(1/5).