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 A354818 #4 Jun 08 2022 15:49:08 %S A354818 15,18,21,27,33,35,39,45,50,51,54,55,57,60,63,65,69,72,75,77,84,85,87, %T A354818 90,91,93,95,98,99,108,111,115,117,119,123,125,126,129,132,133,135, %U A354818 140,141,143,145,147,150,153,155,156,159,161,171,175,177,180,183,185,187,189,198,200,201,203,204,205,207,209,213 %N A354818 Positions of even terms in A346241. %o A354818 (PARI) isA354818(n) = !A354806(n); %Y A354818 Positions of even terms in A346241, of 0's in A354806. %K A354818 nonn %O A354818 1,1 %A A354818 _Antti Karttunen_, Jun 08 2022