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 A354815 #9 Jan 02 2023 08:58:45 %S A354815 9,27,45,49,81,99,117,121,135,162,169,234,242,243,261,270,279,289,297, %T A354815 306,361,363,369,387,405,495,507,529,549,567,639,657,722,729,747,783, %U A354815 801,837,841,891,909,961,1017,1083,1107,1179,1183,1251,1305,1369,1377,1485,1519,1521,1625,1629,1647,1681,1701,1791,1849 %N A354815 Positions of zeros in A354347. %H A354815 Antti Karttunen, <a href="/A354815/b354815.txt">Table of n, a(n) for n = 1..10000</a> %H A354815 <a href="/index/Pri#primorialbase">Index entries for sequences related to primorial base</a> %o A354815 (PARI) isA354815(n) = (0==A354347(n)); %Y A354815 Subsequence of A038838. %Y A354815 Cf. A354347. %Y A354815 Cf. also A354810. %K A354815 nonn %O A354815 1,1 %A A354815 _Antti Karttunen_, Jun 07 2022