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%I #11 Feb 12 2019 08:45:24
%S 0,1,33,282251,5170139875,36297634492764230063,
%T 43540989124396091246149,248033379485570104849994099153187946961,
%U 17204019459451797001978107903201762504044841332131
%N Numerator of Sum(i=1..n-1, 1/i^(2*n-1)).
%C For prime p, p^3 divides a(p), see A130681.
%H Eric Weisstein's World of Mathematics, <a href="http://mathworld.wolfram.com/WolstenholmesTheorem.html">Wolstenholme's Theorem</a>
%H Eric Weisstein's World of Mathematics, <a href="http://mathworld.wolfram.com/HarmonicNumber.html">Harmonic Number</a>
%o (PARI) a(n)=numerator(sum(i=1,n-1,1/i^(2*n-1)))
%Y Denominators are in A228427.
%Y Cf. A001008/A002805.
%K nonn,frac
%O 1,3
%A _Ralf Stephan_, Nov 10 2013