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.
Table of n, a(n) for n=1..11.
Cf. A030445, A030444, A030446, A030448.
Sequence in context: A121667 A291844 A093991 * A302369 A317899 A076936
Adjacent sequences: A030444 A030445 A030446 * A030448 A030449 A030450
David W. Wilson
Corrected and extended by Joseph Myers, May 21, 2004