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 A319417 #12 Sep 25 2018 08:54:55 %S A319417 1,2,4,11,18,75,621,9638,1264052,1294752365,20699153586797, %T A319417 43409394810283725529 %N A319417 Records in A318928. %C A319417 It is very plausible that the next two terms are 1264052 and 1294752365, as in _Rémy Sigrist_'s A319103, but that needs to be checked. %Y A319417 Cf. A318928, A319103, A319418 (a(n) written in base 2). %K A319417 nonn,more,base %O A319417 1,2 %A A319417 _N. J. A. Sloane_, Sep 21 2018 %E A319417 a(9)-a(10) from _Rémy Sigrist_'s results, Sep 25 2018 %E A319417 a(11)-a(12) from _Hiroaki Yamanouchi_, Sep 25 2018