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 A056605 #11 Feb 18 2023 07:29:51
%S A056605 0,0,0,2,1,5,4,9,10,25,46,121,240,619,1353,3286,7773,19046,45766
%N A056605 Number of stable n-celled patterns ("still lifes") in Conway's game of Life (incorrect version).
%C A056605 a(18) and a(19) are incorrect. See A019473 for the correct version of this sequence. - _Nathaniel Johnston_, Aug 19 2018
%H A056605 Mark D. Niemiec, <a href="http://home.interserv.com/~mniemiec/objcount.htm">Life Object Counts</a>
%H A056605 H. Koenig, <a href="http://www.pentadecathlon.com/LifeInfo/Objects/Class1/Stable.html">Stable Objects</a>
%e A056605 a(4)=2 because the block and the tub are the only 4-cell still lifes.
%Y A056605 Cf. A019473.
%K A056605 dead
%O A056605 1,4
%A A056605 _N. J. A. Sloane_, Aug 28 2000