%I #6 May 13 2024 12:21:57
%S 2,4,4,6,4,8,3,8,6,8,4,12,4,6,8,10,4,12,4,12,6,8,4,16,6,8,8,9,4,16,4,
%T 12,8,8,6,18,4,8,8,16,4,12,4,12,12,8,4,20,4,12,8,12,4,16,8,12,8,8,4,
%U 24,4,8,9,14,8,16,4,12,8,12,4,24,4,8,12,12,6,16,4
%N a(n) = tau(7*n) = A000005(7*n).
%H Vaclav Kotesovec, <a href="/A372787/a372787.jpg">Graph - the asymptotic ratio (100000 terms)</a>
%F Sum_{k=1..n} a(k) ~ (13*n*(log(n) + 2*gamma - 1) + n*log(7)) / 7, where gamma is the Euler-Mascheroni constant A001620.
%t Table[DivisorSigma[0, 7*n], {n, 1, 150}]
%Y Cf. A283078.
%Y Cf. A000005, A099777, A372713, A372784, A372785, A372786, A372788, A372789, A372790, A372791, A372792.
%K nonn
%O 1,1
%A _Vaclav Kotesovec_, May 13 2024