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 A080598 #13 Sep 05 2020 20:32:56 %S A080598 3,6,8,11,36,47 %N A080598 For numbers k such that A080570(k) and 2*A080571(k) are distinct Ulam numbers, sequence gives A002858(k). %C A080598 No others terms <= 41000. %C A080598 A002858(k) = A080570(k) + 2*A080571(k). %Y A080598 Cf. A002858, A080570, A080571. %K A080598 nonn,more %O A080598 1,1 %A A080598 _Naohiro Nomoto_, Feb 23 2003 %E A080598 Incorrect terms removed by _Jinyuan Wang_, Sep 05 2020