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 A183082 #10 Nov 09 2015 15:57:09 %S A183082 1,2,3,5,4,8,7,14,6,11,12,22,10,19,21,39,9,16,17,30,18,33,34,61,15,28, %T A183082 29,53,32,59,60,109,13,25,24,45,26,47,46,84,27,50,51,92,52,95,94,171, %U A183082 23,42,43,78,44,81,82,149,49,90,91,166,93,168,169,306,20 %N A183082 Tree generated by the Beatty sequence of 4-sqrt(6). %C A183082 A permutation of the positive integers. %H A183082 Ivan Neretin, <a href="/A183082/b183082.txt">Table of n, a(n) for n = 1..8192</a> %H A183082 <a href="/index/Per#IntegerPermutation">Index entries for sequences that are permutations of the natural numbers</a> %F A183082 Let L(n)=floor(r*n) and U(n)=floor(s*n), where r=4-sqrt(6) and s=r/(r-1). %F A183082 The tree-array T(n,k) is then given by rows: %F A183082 T(0,0) = 1; T(1,0) = 2; T(n,2j) = L(T(n-1),j); T(n,2j+1) = U(T(n-1),j); %F A183082 for j=0,1,...,2^(n-1)-1, n>=2. %e A183082 The top five rows: %e A183082 1 %e A183082 2 %e A183082 3 5 %e A183082 4 8 7 14 %e A183082 6 11 12 22 10 19 21 39 %t A183082 a = {1, 2}; row = {a[[-1]]}; r = 4 - Sqrt[6]; s = r/(r - 1); Do[a = Join[a, row = Flatten[{Floor[#*{r, s}]} & /@ row]], {n, 5}]; a (* _Ivan Neretin_, Nov 09 2015 *) %Y A183082 Cf. A074049, A183079. %K A183082 nonn %O A183082 1,2 %A A183082 _Clark Kimberling_, Dec 23 2010