

A268416


Number of aligned free polyominoes that will fit in a square of size n X n.


6




OFFSET

1,2


COMMENTS

a(n) is the number of free polyominoes that have both width and height <= n. Compare this to Craig Knecht's A268311 which has both height and width = n. The word "aligned" in the title refers to the restriction that the polyominoes have edges parallel to the sides of the square, in contrast with A268427.


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CROSSREFS



KEYWORD

nonn,more


AUTHOR



EXTENSIONS



STATUS

approved



