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 A030446 #14 Jan 13 2023 06:32:53 %S A030446 1,1,6,35,290,2680,26379,267598,2758016,28749456,302120154,3196299285, %T A030446 34007337629 %N A030446 Number of n-celled polyknights (polyominoes connected by knight's moves). %C A030446 A polyknight is a variant of a polyomino in which two tiles a knight's move apart are considered adjacent. A polyknight need not be connected in the sense of a polyomino. %C A030446 These are free polyknights. %H A030446 John Mason, <a href="/A030446/a030446_1.pdf">Illustrations</a> %Y A030446 Cf. A030445, A030444, A030447, A030448. %K A030446 nonn,more %O A030446 1,3 %A A030446 _David W. Wilson_ %E A030446 Corrected and extended by _Joseph Myers_, May 21 2004 %E A030446 a(12)-a(13) from _John Mason_, Jan 13 2023