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 A263392 #16 Jan 10 2018 03:24:27
%S A263392 66837283,68026001,71344361,71604733,74477159,94270439,97579567,
%T A263392 122606647,140022313,153196541,170969579,182720077,198885523,
%U A263392 211327993,220316413,227116031,280536071,285155137,290419777,292202437,293175191,309240779,324576431,331006603
%N A263392 Riesel numbers that have at least two covering sets.
%H A263392 Wikipedia, <a href="http://en.wikipedia.org/wiki/Riesel_number">Riesel number</a>
%e A263392 For every k >= 1, 97579567*2^k - 1 has a divisor in the set {3, 5, 7, 13, 17, 241} and also in the set {3, 5, 13, 17, 97, 241, 257}. 97579567 is therefore in the sequence.
%Y A263392 Cf. A101036, A263391.
%K A263392 nonn
%O A263392 1,1
%A A263392 _Arkadiusz Wesolowski_, Oct 16 2015
%E A263392 1 term inserted by _Arkadiusz Wesolowski_, Aug 28 2016
%E A263392 More terms from _Arkadiusz Wesolowski_, Jan 09 2018