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%I #11 Oct 10 2019 04:02:34
%S 2,2,3,5,7,9,12,14,17,20,23,26,30,33,36,40,44,47,51,55,59,63,67,71,75,
%T 79,84,88,92,97,101,106,111,115,120,125,129,134,139,144,149,154,159,
%U 164,169,175,180,185,190,196,201,206,212,217,223,228,234,240,245,251
%N Least k such that Z(k,4) <= Z(n,5) where Z(m,s) = Sum_{i>=m} 1/i^s.
%o (PARI) u=4; v=5; a(n)=if(n<0,0,k=1; while((zeta(u)-sum(k=1,k-1,1/k^u))>(zeta(v)-sum(i=1,n-1,1/i^v)),k++); k)
%Y Cf. A051890 for least k such that Z(k,2) <= Z(n,3).
%K nonn
%O 0,1
%A _Benoit Cloitre_, Nov 29 2002
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