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A268416 Number of aligned free polyominoes that will fit in a square of size n X n. 6
1, 4, 35, 1280, 262292, 205515653 (list; graph; refs; listen; history; text; internal format)
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.
LINKS
CROSSREFS
Sequence in context: A192012 A076818 A005026 * A268427 A123745 A183882
KEYWORD
nonn,more
AUTHOR
John Mason, Feb 04 2016
EXTENSIONS
a(6) from Talmon Silver, Jul 29 2020
STATUS
approved

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Last modified April 25 09:38 EDT 2024. Contains 371967 sequences. (Running on oeis4.)