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 A103442 #6 Mar 30 2012 18:37:44
%S A103442 1,2,4,6,11,16,27,44,73,124,199,372,613,1142,1874,3926,6209,13660,
%T A103442 21539,46240,80142
%N A103442 Row sums of A103441. Number of two-colored bracelets of n beads with different sets of distances among the white beads.
%t A103442 (* see A103441 *) Table[Length[Union[(dist[f[ #1], n]&)/@Flatten[Table[ListNecklaces[n, Join[1+0*Range[i], 0*Range[n-i]], Dihedral], {i, 1, n-1}], 1]]], {n, 2, 16}]
%Y A103442 Cf. A103441, A056342.
%K A103442 hard,nonn
%O A103442 2,2
%A A103442 _Wouter Meeussen_, Feb 06 2005
%E A103442 a(21) & a(22) from _Robert G. Wilson v_, Aug 09 2010