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A220165 Number of nonsquare simple imperfect squared rectangles of order n up to symmetry. 3
0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 9, 33, 104, 280, 948, 3014, 9494, 30302, 98897, 323372, 1080168, 3666666, 12604812 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,12
COMMENTS
A squared rectangle is a rectangle dissected into a finite number, two or more, of squares. If no two of these squares have the same size the squared rectangle is perfect. A squared rectangle is simple if it does not contain a smaller squared rectangle. The order of a squared rectangle is the number of constituent squares.
REFERENCES
See A002881 and A006983.
LINKS
CROSSREFS
Sequence in context: A048479 A031880 A231765 * A036543 A147269 A147123
KEYWORD
nonn,hard
AUTHOR
Stuart E Anderson, Dec 06 2012
STATUS
approved

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Last modified March 28 13:42 EDT 2024. Contains 371254 sequences. (Running on oeis4.)