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%I #13 Jan 13 2023 06:32:35
%S 1,2,8,68,550,5328,52484,534793,5513338,57494308,604212943,6392547793,
%T 68014392915
%N Number of one-sided 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.
%e The 2 polyknights with 2 cells:
%e X.. ..X
%e ..X X..
%e The 8 polyknights with 3 cells:
%e X. X.. X.. X... X.X .X. .X. X...
%e .. ... ..X .... ... X.. ..X ...X
%e .X .X. ... .X.. .X. ..X X.. .X..
%e .. ... .X. ...X
%e X. ..X
%Y Cf. A030444, A030446, A030447, A030448.
%K nonn,nice,more
%O 1,2
%A _David W. Wilson_
%E Corrected and extended by _Joseph Myers_, May 21 2004
%E a(12)-a(13) from _John Mason_, Jan 13 2023