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 A363392 #49 Jul 08 2023 08:04:55
%S A363392 0,3,0,7,3,11,0,18,0,19,10,23,0,30,0,31,14,42,0,42,0,43,18,47,7,54,0,
%T A363392 66,22,59,0,73,0,67,26,71,0,93,18,79,30,83,0,90,0,98,34,114,0,113,0,
%U A363392 103,60,107,0,114,0,138,42,126,11,126,0,127,46,131,26,180,0,139,50,154,0,157,0,151,54,186,0,162,30
%N A363392 Sum of divisors of 4*n-2 of form 4*k+3.
%F A363392 a(n) = A050452(4*n-2).
%F A363392 G.f.: Sum_{k>0} (4*k-1) * x^(2*k) / (1 - x^(4*k-1)).
%t A363392 a[n_] := DivisorSum[4*n - 2, # &, Mod[#, 4] == 3 &]; Array[a, 100] (* _Amiram Eldar_, Jul 08 2023 *)
%o A363392 (PARI) a(n) = sumdiv(4*n-2, d, (d%4==3)*d);
%Y A363392 Cf. A050452, A359290, A363259.
%K A363392 nonn
%O A363392 1,2
%A A363392 _Seiichi Manyama_, Jul 08 2023