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 A326895 #12 Sep 16 2019 04:29:52
%S A326895 0,0,1,6,48,370,3341,33966,393468,5111100,73753685,1170469192,
%T A326895 20263758984,380047816638,7676106093049,166114206920706,
%U A326895 3834434320842720,94042629507775794,2442147034668044933,66942194905680941268,1931543452344523778392,58519191359156026158522
%N A326895 Number of chiral pairs of color loops of length n with integer entries that cover an initial interval of positive integers.
%H A326895 Andrew Howroyd, <a href="/A326895/b326895.txt">Table of n, a(n) for n = 1..200</a>
%F A326895 Inverse Moebius transform of A326888.
%o A326895 (PARI) a(n)={sum(k=1, n, -k!*(stirling((n+1)\2,k,2) + stirling(n\2+1,k,2))/4 + k!*sumdiv(n,d, eulerphi(d)*stirling(n/d,k,2))/(2*n))} \\ _Andrew Howroyd_, Sep 13 2019
%Y A326895 Row sums of A305541.
%Y A326895 Cf. A326888.
%K A326895 nonn
%O A326895 1,4
%A A326895 _Andrew Howroyd_, Sep 13 2019