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A030445 Number of one-sided n-celled polyknights. 5
1, 2, 8, 68, 550, 5328, 52484, 534793, 5513338, 57494308, 604212943, 6392547793, 68014392915 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,2
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.
LINKS
EXAMPLE
The 2 polyknights with 2 cells:
X.. ..X
..X X..
The 8 polyknights with 3 cells:
X. X.. X.. X... X.X .X. .X. X...
.. ... ..X .... ... X.. ..X ...X
.X .X. ... .X.. .X. ..X X.. .X..
.. ... .X. ...X
X. ..X
CROSSREFS
Sequence in context: A202553 A023164 A053922 * A093990 A361213 A156448
KEYWORD
nonn,nice,more
AUTHOR
EXTENSIONS
Corrected and extended by Joseph Myers, May 21 2004
a(12)-a(13) from John Mason, Jan 13 2023
STATUS
approved

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Last modified March 28 14:21 EDT 2024. Contains 371254 sequences. (Running on oeis4.)