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 A300577 #16 Mar 09 2018 21:38:01 %S A300577 1,21,2037,4794357,196340164597,61763612763039733, %T A300577 151115717157847371950069,346153123972842504418905182250997, %U A300577 26760894238193478629425592359457151764735989,32693238205135988878951555893647307218529027276340275189 %N A300577 a(n) is the decimal expansion of A300558(n). %H A300577 Seiichi Manyama, <a href="/A300577/b300577.txt">Table of n, a(n) for n = 1..35</a> %e A300577 n | A300558(n) | a(n) %e A300577 -------------------------------------- %e A300577 1 | 1 | 1 %e A300577 2 | 10101 | 21 %e A300577 3 | 11111110101 | 2037 %e A300577 4 | 10010010010011111110101 | 4794357 %Y A300577 Cf. A300558. %K A300577 nonn,base %O A300577 1,2 %A A300577 _Seiichi Manyama_, Mar 09 2018