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 A363033 #15 Jul 06 2023 07:28:15
%S A363033 0,3,0,0,11,0,0,16,0,0,21,0,8,26,0,0,31,0,0,36,21,0,41,0,0,46,0,0,77,
%T A363033 0,0,56,0,13,61,0,31,66,0,0,71,0,0,76,36,0,112,0,0,86,0,0,132,0,0,96,
%U A363033 0,0,101,36,46,106,0,0,129,0,0,116,51,0,121,0,41,126,0,0,187,0,0,136,0,0,182,0,61,192,0,0
%N A363033 Sum of divisors of 5*n-1 of form 5*k+3.
%F A363033 a(n) = A284281(5*n-1).
%F A363033 G.f.: Sum_{k>0} (5*k-2) * x^(3*k-1) / (1 - x^(5*k-2)).
%t A363033 a[n_] := DivisorSum[5*n - 1, # &, Mod[#, 5] == 3 &]; Array[a, 100] (* _Amiram Eldar_, Jul 06 2023 *)
%o A363033 (PARI) a(n) = sumdiv(5*n-1, d, (d%5==3)*d);
%Y A363033 Cf. A363034, A363035, A363053.
%Y A363033 Cf. A284281, A359288, A363155.
%K A363033 nonn
%O A363033 1,2
%A A363033 _Seiichi Manyama_, Jul 06 2023