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 A271927 #12 May 09 2016 01:04:25 %S A271927 1,2,4,6,9,23,25,71,73,263,265,911,913,5021,5023,23291,23293,41359, %T A271927 152681,152683,285985,857951,857953,1517571,1873772,2498606,11032457, %U A271927 11032459,16576383,50600183,50600185,58908616,235819403,235819405,707458211,707458213,1160837269,3482511803,3482511805 %N A271927 Records in A268868. %H A271927 R. J. Mathar, <a href="/A271927/b271927.txt">Table of n, a(n) for n = 1..144</a> %F A271927 a(n) = A268868(A271928(n)). - _R. J. Mathar_, May 06 2016 %Y A271927 Cf. A268868, A271928. %K A271927 nonn %O A271927 1,2 %A A271927 _N. J. A. Sloane_, May 04 2016