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 A166866 #9 Oct 13 2024 11:29:40 %S A166866 1,1,1,3,1,2,1,3,5,1,2,3,1,3,5,7,1,2,3,4,1,3,5,7,9,1,2,3,4,5,1,3,5,7, %T A166866 9,11,1,2,3,4,5,6,1,3,5,7,9,11,13,1,2,3,4,5,6,7,1,3,5,7,9,11,13,15,1, %U A166866 2,3,4,5,6,7,8,1,3,5,7,9,11,13,15,17,1,2,3,4,5,6,7,8,9 %N A166866 Interleave the fractals A158405, A002260. %C A166866 See A166494. Consider a(n+1) sum by 1,1,2,2,3,3=A008619 terms: 1; 1; 3+1=4; 2+1=3; 3+5+1=9; 2+3+1=6; 3+5+7+1=16; 2+3+4+1=10; this is A123596(n+2).Via A001105(n+1),A123596 is linked to (extended) Mendeleyev-Moseley-Seaborg table of the elements. %Y A166866 Cf. A001105, A002260, A008619, A123596, A158405, A166494. %K A166866 nonn %O A166866 0,4 %A A166866 _Paul Curtz_, Oct 22 2009