%I #11 Jun 25 2023 10:40:21
%S 0,1,0,1,0,2,0,1,0,2,0,1,0,2,1,1,0,2,0,1,0,2,0,2,0,3,0,1,0,2,0,1,1,2,
%T 0,1,1,2,0,1,0,4,0,1,0,2,0,2,0,2,1,1,0,2,0,1,0,3,1,3,0,2,0,1,0,2,0,1,
%U 1,3,0,1,0,3,0,1,0,4,0,1,1,2,1,1,0,2,1,1,0,3,0,2,0,2,0,3,0,2,0,1
%N Number of divisors of 7*n-6 of form 7*k+2.
%C Also number of divisors of 7*n-6 of form 7*k+4.
%F a(n) = A363795(7*n-6) = A363806(7*n-6).
%F G.f.: Sum_{k>0} x^(4*k-2)/(1 - x^(7*k-5)).
%F G.f.: Sum_{k>0} x^(2*k)/(1 - x^(7*k-3)).
%t a[n_] := DivisorSum[7*n - 6, 1 &, Mod[#, 7] == 2 &]; Array[a, 100] (* _Amiram Eldar_, Jun 25 2023 *)
%o (PARI) a(n) = sumdiv(7*n-6, d, d%7==2);
%Y Cf. A363795, A363806.
%K nonn
%O 1,6
%A _Seiichi Manyama_, Jun 25 2023