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 A276787 #7 Dec 19 2016 05:25:10 %S A276787 31,63,94,127,175,189,190,255,283,351,379,381,382,511,526,567,568,571, %T A276787 703,759,763,765,766,850,1023,1039,1053,1054,1135,1137,1138,1143,1144, %U A276787 1147,1407,1471,1519,1527,1531,1533,1534,1579,1701,1702,1705,1714,2047,2079,2107,2109,2110,2191,2271 %N A276787 Repeated numbers in A276786. %H A276787 Rémy Sigrist, <a href="/A276787/b276787.txt">Table of n, a(n) for n = 1..10000</a> %Y A276787 Cf. A002977, A276786. %K A276787 nonn %O A276787 1,1 %A A276787 _N. J. A. Sloane_, Oct 06 2016