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 A087663 #21 Mar 04 2021 19:09:21 %S A087663 6,7,8,17,40,151,877,6835,19687,34502,46375,109057,1315376,1463921, %T A087663 33422711,117091367,436282342,542784031,550371662,5227148122, %U A087663 55251647224 %N A087663 Indices of records in A087666. %Y A087663 Cf. A087666, A086336. %K A087663 nonn,more %O A087663 1,1 %A A087663 _N. J. A. Sloane_, Sep 27 2003 %E A087663 More terms from _Robert G. Wilson v_, Oct 10 2003 %E A087663 a(11) from _N. J. A. Sloane_, Oct 16 2003 %E A087663 a(12)-a(16) from _Robert G. Wilson v_, Mar 11 2004 %E A087663 a(17)-a(20) from _Max Alekseyev_, Jul 29 2011 %E A087663 a(21) from _Chai Wah Wu_, Mar 04 2021