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 A171866 #11 Sep 12 2019 15:00:42 %S A171866 0,1,2,6,9,14,15,17,42,56,62,92,131,152,170,206,223,307,319,331,367, %T A171866 368,415,508,650,705,832,1024,1086,1302,1411,1582,1605,1760,1800,1833, %U A171866 2021,2028,2238,2287,2368,2944,3151,3323,3420,3451,3815,4029,4164,4175,4466 %N A171866 Records in A181391 (values). %H A171866 Benjamin Chaffin, <a href="/A171866/b171866.txt">Table of n, a(n) for n = 1..13808</a> (first 345 terms from N. J. A. Sloane) %Y A171866 Cf. A181391 (Van Eck's sequence). %K A171866 nonn %O A171866 1,3 %A A171866 _N. J. A. Sloane_, Oct 17 2010