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 A056614 #15 Sep 12 2018 20:30:49 %S A056614 0,0,1,0,0,3,0,1,1,1,1,6,3,20,29,98,199,484,1083,2722,6596 %N A056614 Number of n-celled P2-oscillators in Conway's game of Life. %C A056614 The three six-bit period 2 oscillators are Toad, Clock, and Beacon. - _Ed Pegg Jr_, Sep 05 2018 %H A056614 Mark D. Niemiec, <a href="https://web.archive.org/web/20130121030055/http://home.interserv.com/~mniemiec/objcount.htm">Life Object Counts</a> %H A056614 Mark D. Niemiec, <a href="http://conwaylife.com/ref/mniemiec/osc.htm">Life Oscillators</a> %H A056614 <a href="/index/Ce#cell">Index entries for sequences related to cellular automata</a> %Y A056614 Cf. A019473, A318858. %K A056614 nonn,more %O A056614 1,6 %A A056614 _N. J. A. Sloane_, Aug 28 2000 %E A056614 a(20)-a(21) from _Ed Pegg Jr_, Sep 05 2018