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 A327443 #15 Sep 13 2019 15:09:38 %S A327443 0,2,4,13,145,416,621,1856,4730,5163,8113,18260,142396,1650399, %T A327443 6569927,19975865,23773865,371728346,517406582,642281555,864490611, %U A327443 1352215149,1503350552 %N A327443 Indices of zeros in A327442. %Y A327443 Cf. A327442. %K A327443 nonn,more %O A327443 1,2 %A A327443 _N. J. A. Sloane_, Sep 12 2019 %E A327443 a(12)-a(20) from _Rémy Sigrist_, Sep 13 2019 %E A327443 a(21)-a(23) from _Seiichi Manyama_, Sep 13 2019