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 A169671 #21 Jul 27 2025 20:16:08 %S A169671 0,0,0,0,0,0,1,0,0,0,0,1,1,0,0,0,1,0,1,0,0,0,1,1,1,0,0,1,0,0,1,0,1,1, %T A169671 0,0,1,1,0,1,0,0,1,1,1,1,0,1,0,1,0,1,1,1,0,1,1,0,1,1,1,1,1,1,0,0,0,0, %U A169671 0,0,1,0,0,0,0,1,1,0,0,0,1,0,1,0,0,0,1,1,1,0,0,1,0,0,1,0,1,1,0 %N A169671 Lexicographically earliest de Bruijn sequence for n = 6 and k = 2. %H A169671 Ray Chandler, <a href="/A169671/b169671.txt">Table of n, a(n) for n = 0..1023</a> %H A169671 Frank Ruskey, <a href="http://combos.org/bruijn">Generate de Bruijn sequences</a> %H A169671 <a href="/index/Rec#order_63">Index entries for linear recurrences with constant coefficients</a>, signature (1, -1, 1, -1, 1, -1, 1, -1, 1, -1, 1, -1, 1, -1, 1, -1, 1, -1, 1, -1, 1, -1, 1, -1, 1, -1, 1, -1, 1, -1, 1, -1, 1, -1, 1, -1, 1, -1, 1, -1, 1, -1, 1, -1, 1, -1, 1, -1, 1, -1, 1, -1, 1, -1, 1, -1, 1, -1, 1, -1, 1, -1, 1). %e A169671 Periodic with period 64, the period being: %e A169671 0000001000011000101000111001001011001101001111010101110110111111. %Y A169671 Cf. A021913, A169675, A080679, A169672, A169671, A169673, A169674. %Y A169671 See A058342 for another version. %K A169671 nonn,easy %O A169671 0,1 %A A169671 _N. J. A. Sloane_, Apr 11 2010