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 A358774 #5 Dec 01 2022 21:09:03 %S A358774 10,26,27,30,34,45,58,63,70,74,75,78,82,90,99,102,105,106,110,117,122, %T A358774 125,146,147,153,165,171,174,175,178,182,190,194,195,202,207,210,218, %U A358774 222,226,230,231,234,238,245,246,250,255,261,270,273,274,275,279,285,286,298,306,310,314,318,325,330,333 %N A358774 Numbers whose arithmetic derivative is of the form 4k+3, cf. A003415. %o A358774 (PARI) isA358774(n) = A358773(n); %Y A358774 Cf. A003415, A358773 (characteristic function). %Y A358774 Setwise difference A235991 \ A358772. Cf. also A327862, A327864. %K A358774 nonn %O A358774 1,1 %A A358774 _Antti Karttunen_, Dec 01 2022