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%I #17 Jan 13 2023 05:40:01
%S 1,4,28,234,2162,20972,209608,2135572,22049959,229939414,2416816416,
%T 25569786440,272057195864
%N Number of fixed n-celled polyknights.
%C 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.
%D G. Aleksandrowicz and G. Barequet, Parallel enumeration of lattice animals, Proc. 5th Int. Frontiers of Algorithmics Workshop, Zhejiang, China, Lecture Notes in Computer Science, 6681, Springer-Verlag, 90-99, May 2011.
%Y Cf. A030445, A030446, A030447, A030448.
%K nonn,more
%O 1,2
%A _David W. Wilson_
%E Corrected and extended by Guenter Stertenbrink (Sterten(AT)aol.com), May 23 2004
%E 12th term from _Gill Barequet_, May 24 2011
%E a(13) from _John Mason_, Jan 13 2023