A361526 Number of ways of dividing an n X 4 rectangle into integer-sided rectangles, up to rotations and reflections.

1, 6, 61, 892, 9235, 406653, 9252097, 211703640

Offset

0,2

Links

Table of n, a(n) for n=0..7.

Formula

a(n) >= A220297(n)/4 for n != 4.

a(n) ~ A220297(n)/4.

Crossrefs

Fourth column of A361523.

Cf. A220297 (rotations and reflections are considered distinct), A359020 (square pieces).

Sequence in context: A049120 A346983 A271841 * A380039 A056546 A127695

Adjacent sequences: A361523 A361524 A361525 * A361527 A361528 A361529

Keyword

nonn,more

Author

Pontus von Brömssen, Mar 15 2023

Status

approved