A030446 Number of n-celled polyknights (polyominoes connected by knight's moves).

1, 1, 6, 35, 290, 2680, 26379, 267598, 2758016, 28749456, 302120154, 3196299285, 34007337629

Offset

1,3

Comments

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.

These are free polyknights.

Links

Table of n, a(n) for n=1..13.

John Mason, Illustrations

Crossrefs

Cf. A030445, A030444, A030447, A030448.

Sequence in context: A087631 A167579 A357095 * A093989 A357037 A356460

Adjacent sequences: A030443 A030444 A030445 * A030447 A030448 A030449

Keyword

nonn,more

Author

David W. Wilson

Extensions

Corrected and extended by Joseph Myers, May 21 2004

a(12)-a(13) from John Mason, Jan 13 2023

Status

approved