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A372714 a(n) = tau(3*n-1) = A000005(3*n-1).

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%I A372714 #6 May 11 2024 09:40:38
%S A372714 2,2,4,2,4,2,6,2,4,2,6,4,4,2,6,2,6,2,8,2,4,4,6,2,4,4,10,2,4,2,6,4,6,2,
%T A372714 8,2,8,2,6,4,4,4,8,2,4,2,12,4,4,2,8,4,4,4,6,2,8,2,10,2,8,4,6,2,4,2,12,
%U A372714 4,4,4,6,4,4,4,12,2,8,2,6,2,6,6,8,2,4,2
%N A372714 a(n) = tau(3*n-1) = A000005(3*n-1).
%F A372714 Sum_{k=1..n} a(k) ~ 2*n * (log(n) + 2*gamma - 1 + 2*log(3)) / 3, where gamma is the Euler-Mascheroni constant A001620.
%t A372714 Table[DivisorSigma[0, 3*n-1], {n, 1, 150}]
%Y A372714 Cf. A372713, A372715.
%Y A372714 Cf. A000005, A099777, A099774.
%K A372714 nonn
%O A372714 1,1
%A A372714 _Vaclav Kotesovec_, May 11 2024