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 A291212 #7 Aug 22 2017 20:15:02 %S A291212 3,7,8,18,19,50,140,141,391,1079,21986,59824,59825,162694,162695, %T A291212 442342,1202520,3268920,24154825,65659825,485165015,1318815534, %U A291212 1318815535,26489121866,72004899050,195729609117,532048240264,1446257063927 %N A291212 Numbers that can be approximated in increasing quality by k*k^(1/k). %C A291212 Best matches corresponding to k=A291211(n). %e A291212 See A291211. %Y A291212 Cf. A291210, A291211. %K A291212 nonn %O A291212 1,1 %A A291212 _Hugo Pfoertner_, Aug 21 2017