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 A354934 #8 Jun 17 2022 14:52:11
%S A354934 5,9,13,17,21,25,29,37,41,49,53,57,61,73,81,85,89,93,97,101,109,113,
%T A354934 117,121,125,129,137,149,157,169,173,181,185,193,197,201,217,229,233,
%U A354934 237,241,253,257,269,277,281,289,293,297,301,309,313,317,337,341,349,353,361,373,381,389,397,401,409,413,417,421,425
%N A354934 Row 4 of A354940: Numbers k for which A345992(k) = 4, divided by 4.
%C A354934 Apparently a subsequence of A016813.
%t A354934 q[n_] := Module[{m = 1}, While[!Divisible[m*(m + 1), 4*n], m++]; GCD[4*n, m] == 4]; Select[Range[425], q] (* _Amiram Eldar_, Jun 17 2022 *)
%o A354934 (PARI) A354934(n) = A354940sq(4,n);
%Y A354934 Row 4 of A354940.
%Y A354934 Cf. A016813, A344005, A345992.
%K A354934 nonn
%O A354934 1,1
%A A354934 _Antti Karttunen_, Jun 15 2022