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 A363885 #13 Jun 26 2023 06:33:22
%S A363885 1,0,2,0,2,0,2,0,2,0,2,1,2,0,2,0,2,0,2,0,4,0,2,0,2,0,2,0,2,2,2,0,2,0,
%T A363885 2,0,3,0,4,0,2,0,2,0,2,0,2,2,2,0,2,0,4,0,2,0,4,0,2,0,2,0,2,0,2,2,2,0,
%U A363885 4,0,2,0,2,0,4,1,2,0,2,0,2,0,2,2,4,0,2,0,2,0,2,0,4,0,2,0,2,0,4,0
%N A363885 Number of divisors of 7*n-3 of form 7*k+2.
%F A363885 a(n) = A363795(7*n-3).
%F A363885 G.f.: Sum_{k>0} x^(2*k-1)/(1 - x^(7*k-5)).
%t A363885 a[n_] := DivisorSum[7*n - 3, 1 &, Mod[#, 7] == 2 &]; Array[a, 100] (* _Amiram Eldar_, Jun 26 2023 *)
%o A363885 (PARI) a(n) = sumdiv(7*n-3, d, d%7==2);
%Y A363885 Cf. A363850, A363855, A363886.
%Y A363885 Cf. A363795.
%K A363885 nonn
%O A363885 1,3
%A A363885 _Seiichi Manyama_, Jun 26 2023