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 A056467 #10 Sep 29 2019 11:39:30
%S A056467 0,0,0,0,0,0,0,0,0,0,720,720,15120,15120,191520,191520,1905120,
%T A056467 1905120,16435440,16435440,129230640,129229920,953029440,953028720,
%U A056467 6711344640,6711329520,45674188560,45674173440,302899156560,302898965040,1969147121760,1969146930240
%N A056467 Number of primitive (aperiodic) palindromes using exactly six different symbols.
%D A056467 M. R. Nester (1999). Mathematical investigations of some plant interaction designs. PhD Thesis. University of Queensland, Brisbane, Australia. [See A056391 for pdf file of Chap. 2]
%H A056467 Andrew Howroyd, <a href="/A056467/b056467.txt">Table of n, a(n) for n = 1..200</a>
%F A056467 a(n) = Sum_{d|n} mu(d)*A056457(n/d).
%Y A056467 Column 6 of A327873.
%Y A056467 Cf. A056457, A056462.
%K A056467 nonn
%O A056467 1,11
%A A056467 _Marks R. Nester_
%E A056467 Terms a(28) and beyond from _Andrew Howroyd_, Sep 29 2019