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 A384274 #16 Jun 12 2025 14:07:12 %S A384274 1,2,2,5,20,96,581,4079,31079,247169,2018826,16771564,141113504, %T A384274 1199154541,10274686867 %N A384274 Number of connected components of polyhedra in the quarter cubic honeycomb up to translation, rotation, and reflection of the honeycomb. %H A384274 Peter Kagey, <a href="/A384274/a384274.pdf">Illustration of a(4) = 20</a>. %H A384274 Wikipedia, <a href="https://en.wikipedia.org/wiki/Quarter_cubic_honeycomb">Quarter cubic honeycomb</a> %Y A384274 Cf. A038119 (cubic honeycomb), A038181 (bitruncated cubic honeycomb), A343909 (tetrahedral-octahedral honeycomb), A384254 (rectified cubic honeycomb). %Y A384274 Cf. A384486. %K A384274 nonn %O A384274 0,2 %A A384274 _Peter Kagey_, May 24 2025 %E A384274 a(9)-a(14) from _Bert Dobbelaere_, Jun 12 2025