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 A358748 #5 Dec 07 2022 14:59:53 %S A358748 6,18,22,26,30,34,38,50,58,66,74,90,98,102,106,122,126,130,138,142, %T A358748 146,158,170,174,178,182,186,194,198,210,222,226,234,238,258,262,270, %U A358748 274,278,286,290,298,314,322,330,338,346,350,362,370,374,378,382,386,394,398,406,410,426,442,466,482,486 %N A358748 Numbers k such that A358669(k) == 1 (mod 4). %H A358748 <a href="/index/Pri#primorialbase">Index entries for sequences related to primorial base</a> %o A358748 (PARI) isA358748(n) = A358758(n); %Y A358748 Setwise difference A016825 \ A358749. %Y A358748 Cf. A003415, A152822, A276086, A358758 (characteristic function), A358669. %K A358748 nonn %O A358748 1,1 %A A358748 _Antti Karttunen_, Dec 06 2022