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 A102530 #3 Mar 30 2012 18:57:06 %S A102530 1,2,3,4,5,6,8,7,9,10,13,11,14,12,16,15,19,17,22,18,23,20,26,21,27,24, %T A102530 31,25,32,28,36,29,37,30,39,33,42,34,44,35,45,38,49,40,51,41,53,43,55, %U A102530 46,59,47,60,48,62,50,64,52,67,54,69,56,72,57,73,58,75,61,78,63,81,65 %N A102530 Permutation of N from A102528 and A102529. %F A102530 Let s(n)=A102528(n), t(n)=A102529(n). Then A102530 is given by s(1), t(1), s(2), t(2), s(3), t(3), ... %Y A102530 Cf. A102528, A102539. %K A102530 nonn %O A102530 1,2 %A A102530 _Clark Kimberling_, Jan 13 2005