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 A278119 #10 May 19 2023 15:20:42 %S A278119 1,2,3,5,9,27,81,163,3451,7372,82177,3716,2769544,25899347,357567610, %T A278119 4229297109 %N A278119 a(n) is the index of the first occurrence of n in A278116. %C A278119 a(18) = 42945966786, but a(17) > 5*10^10. %H A278119 R. B. Eggleton, J. S. Kimberley and J. A. MacDougall, <a href="http://hdl.handle.net/1959.13/1441260">Square-free rank of integers</a>, Journal of Combinatorial Mathematics and Combinatorial Computing Vol. 106, Issue August 2018, p. 185-207. %Y A278119 Cf. A278106, A278116. %K A278119 nonn,hard,more %O A278119 1,2 %A A278119 _Jason Kimberley_, Feb 15 2017