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 A186324 #6 Mar 30 2012 18:57:18 %S A186324 1,3,5,6,8,9,11,12,14,16,17,19,20,22,23,25,27,28,30,31,33,35,36,38,39, %T A186324 41,42,44,46,47,49,50,52,53,55,57,58,60,61,63,65,66,68,69,71,72,74,76, %U A186324 77,79,80,82,83,85,87,88,90,91,93,94,96,98,99,101,102,104,106,107,109,110,112,113,115,117,118,120,121,123,124,126,128,129,131,132,134,135,137,139,140,142,143,145,147,148,150,151,153,154,156,158 %N A186324 Adjusted joint rank sequence of (f(i)) and (g(j)) with f(i) before g(j) when f(i)=g(j), where f and g are the squares and octagonal numbers. Complement of A186325. %C A186324 See A186219 for a discussion of adjusted joint rank sequences. %e A186324 First, write %e A186324 1..4...9..16....25..36....49..64... (squares) %e A186324 1....8.......21........40........65. (octagonal) %e A186324 Replace each number by its rank, where ties are settled by ranking the square number before the octagonal: %e A186324 a=(1,3,5,6,8,9,11,12,14,...)=A186324 %e A186324 b=(2,4,7,10,13,15,18,21,...)=A186325. %t A186324 (* adjusted joint ranking; general formula *) %t A186324 d=1/2; u=1; v=0; w=0; x=3; y=-2; z=0; %t A186324 h[n_]:=-y+(4x(u*n^2+v*n+w-z-d)+y^2)^(1/2); %t A186324 a[n_]:=n+Floor[h[n]/(2x)]; %t A186324 k[n_]:=-v+(4u(x*n^2+y*n+z-w+d)+v^2)^(1/2); %t A186324 b[n_]:=n+Floor[k[n]/(2u)]; %t A186324 Table[a[n], {n, 1, 100}] (* A186324 *) %t A186324 Table[b[n], {n, 1, 100}] (* A186325 *) %Y A186324 Cf. A186219, A186325, A186326, A186327, %Y A186324 A000290 (squares), A000567 (octagonal). %K A186324 nonn %O A186324 1,2 %A A186324 _Clark Kimberling_, Feb 17 2011