This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A363886 #12 Jun 26 2023 06:33:10
%S A363886 0,0,0,1,0,0,0,0,2,0,0,0,0,2,0,0,0,0,2,0,1,0,0,2,0,0,0,0,2,0,0,0,2,2,
%T A363886 0,0,0,0,2,0,0,0,0,2,2,0,0,0,2,0,0,1,0,2,0,0,2,0,2,0,0,0,0,2,0,0,0,0,
%U A363886 4,0,2,0,0,2,0,0,0,0,2,0,2,0,0,2,0,0,0,0,2,2,0,0,2,2,0,0,1,0,2,0
%N A363886 Number of divisors of 7*n-3 of form 7*k+5.
%F A363886 a(n) = A363807(7*n-3).
%F A363886 G.f.: Sum_{k>0} x^(5*k-1)/(1 - x^(7*k-2)).
%t A363886 a[n_] := DivisorSum[7*n - 3, 1 &, Mod[#, 7] == 5 &]; Array[a, 100] (* _Amiram Eldar_, Jun 26 2023 *)
%o A363886 (PARI) a(n) = sumdiv(7*n-3, d, d%7==5);
%Y A363886 Cf. A363850, A363855, A363885.
%Y A363886 Cf. A363807.
%K A363886 nonn
%O A363886 1,9
%A A363886 _Seiichi Manyama_, Jun 26 2023