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 A064667 #5 Mar 30 2012 16:49:13 %S A064667 73,82,129,201,212,220,221,238,255,276,308,319,343,362,382,597,640, %T A064667 1011,1055,1116,1172,1235,1292,1360,1422,1491,1562,1640,1719,1800, %U A064667 1900,2973,3102,3234,3400,3538,3731,3886,4045,4216,4390,4570,4755 %N A064667 Regard A064413 as giving a permutation of the positive integers; sequence gives second infinite cycle, beginning at its smallest term, 73. %H A064667 J. C. Lagarias, E. M. Rains and N. J. A. Sloane, <a href="http://arXiv.org/abs/math.NT/0204011">The EKG sequence</a>, Exper. Math. 11 (2002), 437-446. %H A064667 <a href="/index/Ed#EKG">Index entries for sequences related to EKG sequence</a> %e A064667 Permutation has cycles (1) (2) (3, 4, 6, 9, 10, 5) ( ..., 20, 18, 12, 7, 14, 13, 28, 26, ...) (8) ... %Y A064667 Cf. A064413, A064665-A064669. %K A064667 nonn %O A064667 1,1 %A A064667 _N. J. A. Sloane_, Oct 11 2001