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 A328035 #11 Oct 24 2019 16:24:57
%S A328035 0,0,1,2,7,23,78,311,1297,6200,31747,178703,1070388,6842898,46158435,
%T A328035 327718768,2437732593,18948528721,153498234770,1293122838953,
%U A328035 11306474635818,102425551817363,959826751122645,9290811889272509,92771812680385087,954447072777977556
%N A328035 Number of length n primitive (period n) bracelet structures which are not periodic palindromes using an infinite alphabet.
%C A328035 Equivalently, the number of length n bracelet structures that do not have any symmetry under the action of the dihedral group. The corresponding sequence for necklace structures that do not have any symmetry under the action of the cyclic group is A060223.
%H A328035 Andrew Howroyd, <a href="/A328035/b328035.txt">Table of n, a(n) for n = 1..200</a>
%F A328035 a(n) = A276548(n) - A285042(n).
%e A328035 For n = 5, the 7 bracelet structures have the patterns AAABC, AABAC, AABBC, ABABC, AABCD, ABACD, ABCDE.
%o A328035 (PARI) \\ Requires T from A309784.
%o A328035 seq(n)={my(A=T(n)); vector(n, i, vecsum(A[i, ]))}
%Y A328035 Row sums of A309784.
%Y A328035 Cf. A060223, A276548, A285042.
%K A328035 nonn
%O A328035 1,4
%A A328035 _Andrew Howroyd_, Oct 02 2019