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 A098097 #30 Jun 23 2024 02:24:10 %S A098097 1,5,9,101,1385,3493,30121,358885,225859433,521661150629, %T A098097 1537769393977769,248286184577158309349,2349690596380762356487460713, %U A098097 7261901690904608168867803518651168165,76840829143792845266223009702402770017026931113 %N A098097 Terms of sequence A005150 interpreted as numbers written in base 4 (written here in base ten). %C A098097 The terms in A005150 contain no digits other than 1, 2, and 3, so they can be read as numbers in base 4. %H A098097 Edward Krogius, <a href="/A098097/b098097.txt">Table of n, a(n) for n = 1..25</a> %F A098097 A005150(n) = A007090(a(n)). - _Michel Marcus_, Jun 22 2024 %e A098097 A005150(5) = 111221, and 111221_4 = 1385. %Y A098097 Cf. A005150, A007090. %K A098097 nonn,base %O A098097 1,2 %A A098097 _Axel Harvey_, Sep 14 2004 %E A098097 a(13)-a(15) added by _Andrew Howroyd_, Feb 12 2020