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 A182975 #10 Mar 30 2012 18:39:49 %S A182975 1,1,2,9,30,59,67,97,197,513,1729,1922,3239,4646,10734,15592,39474, %T A182975 238623,498579 %N A182975 Numerators of fractions with the same position in A020652/A038567 and A182972/A182973. %C A182975 The positions of the matching fractions are given in A182974. %C A182975 The denominators of the matching fractions are given in A182976. %C A182975 The initial (zeroth) term of A038567 is ignored. %D A182975 S. Cook, Problem 511: An Enumeration Problem, Journal of Recreational Mathematics, Vol. 9:2 (1976-77), 137. Solution by the Problem Editor, JRM, Vol. 10:2 (1977-78), 122-123. %H A182975 Paul Yiu, <a href="http://math.fau.edu/Yiu/RecreationalMathematics2003.pdf">Recreational Mathematics</a>, 24.3.1 Appendix: Two enumerations of the rational numbers in (0,1), page 633. %e A182975 The matching fractions are 1/2, 1/3, 2/5, 9/23, 30/73, 59/143 ... (this is A182975/A182976). %Y A182975 Cf. A020652, A038567, A182972-A182974, A182976. %K A182975 nonn,frac,more %O A182975 1,3 %A A182975 _William Rex Marshall_, Dec 16 2010