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 A038181 #29 Jul 08 2025 22:09:33 %S A038181 1,2,6,35,251,2602,30900,400818,5401599,74617105,1047497078, %T A038181 14888851869 %N A038181 Number of "connected animals" formed from n 4-gon or 6-gon connected truncated octahedra in the b.c.c. lattice, allowing translation and rotations of the lattice and reflections. %C A038181 These are "free polyforms" consisting of face-connected polyhedral cells in the bitruncated cubic honeycomb. - _Peter Kagey_, Jun 23 2025 %H A038181 S. T. Coffin, <a href="http://www.johnrausch.com/PuzzlingWorld/">Puzzling World of Polyhedral Dissections</a>, Oxford Univ. Press, 1991. %H A038181 M. Owen, <a href="http://www.quinapalus.com/splatts.html">Splatts</a> %H A038181 T. Sillke, <a href="http://www.mathematik.uni-bielefeld.de/~sillke/PENTA/notar">Notations for polyspheres</a> %H A038181 <a href="/index/Ba#bcc">Index entries for sequences related to b.c.c. lattice</a> %H A038181 Wikipedia, <a href="https://en.wikipedia.org/wiki/Bitruncated_cubic_honeycomb">Bitruncated cubic honeycomb</a> %Y A038181 Cf. A000162, A038119, A038168-A038174, A038180, A038386. %K A038181 nonn,more %O A038181 1,2 %A A038181 Torsten Sillke (TORSTEN.SILLKE(AT)LHSYSTEMS.COM) %E A038181 More terms from _Achim Flammenkamp_ %E A038181 Definition corrected by _Fred Bayer_, Aug 11 2010 %E A038181 More terms from _Mark Owen_, Oct 11 2013