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A291807 The number of symmetric polyomino tilings of n X n square. 5
1, 5, 67, 3000 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,2
COMMENTS
The sequence gives the number of distinct tilings by polyominoes of a square with side n, considering tilings that have at least one symmetry. As for "free" polyominoes, tilings that are reflections or rotations of each other are not considered distinct.
LINKS
CROSSREFS
Cf. A268416 (polyominoes that will fit in n-sided square), A291806 (polyomino tilings of square), A291808 (tilings with distinct polyominoes), A291809 (tilings with differently sized polyominoes).
Sequence in context: A244589 A113064 A352860 * A197776 A197606 A207979
KEYWORD
nonn,more
AUTHOR
John Mason, Sep 01 2017
STATUS
approved

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Last modified March 1 18:30 EST 2024. Contains 370443 sequences. (Running on oeis4.)