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 A354816 #5 Jun 07 2022 16:02:04 %S A354816 2,3,4,5,7,8,11,13,17,19,23,29,30,31,35,37,41,43,44,47,53,59,60,61,65, %T A354816 66,67,71,73,77,79,83,89,95,97,101,103,107,109,110,113,114,119,127, %U A354816 131,137,139,143,149,151,155,157,161,163,165,167,170,173,174,179,181,191,193,197,199,203,211,215,221,223,227,229 %N A354816 Positions of -1's in A354347. %H A354816 <a href="/index/Pri#primorialbase">Index entries for sequences related to primorial base</a> %o A354816 (PARI) isA354816(n) = (-1==A354347(n)); %Y A354816 Cf. A354347, A354817 (characteristic function). %K A354816 nonn %O A354816 1,1 %A A354816 _Antti Karttunen_, Jun 07 2022