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A361525 Number of ways of dividing an n X 3 rectangle into integer-sided rectangles, up to rotations and reflections. 1
1, 3, 17, 54, 892, 8159, 80021, 791821, 7906439, 79069308 (list; graph; refs; listen; history; text; internal format)
OFFSET
0,2
LINKS
Table of n, a(n) for n=0..9.
FORMULA
a(n) >= A208215(n)/4 for n != 3.
a(n) ~ A208215(n)/4.
CROSSREFS
Third column of A361523.
Cf. A208215 (rotations and reflections are considered distinct), A359019 (square pieces), A360632.
Sequence in context: A173733 A294134 A258032 * A033562 A212415 A152457
Adjacent sequences: A361522 A361523 A361524 * A361526 A361527 A361528
KEYWORD
nonn,more
AUTHOR
Pontus von Brömssen, Mar 15 2023
STATUS
approved

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Last modified May 29 07:06 EDT 2024. Contains 372926 sequences. (Running on oeis4.)