

A172477


The number of ways to dissect an n X n square into polyominoes of size n.


2




OFFSET

1,2


REFERENCES

R. S. Harris, Counting Nonomino Tilings and Other Things of that Ilk, G4G9 Gift Exchange book. [From Bob Harris (me13013(AT)gmail.com), Mar 13 2010]
J. de Ruiter, On Jigsaw Sudoku Puzzles and Related Topics, Bachelor Thesis, Leiden Institute of Advanced Computer Science, 2010. [From Johan de Ruiter, Jun 15 2010]


LINKS

Table of n, a(n) for n=1..9.
R. S. Harris, Counting Polyomino Tilings [From Bob Harris (me13013(AT)gmail.com), Mar 13 2010]


EXAMPLE

A 2 X 2 square can be covered by two dominoes by either positioning them vertically or horizontally.


CROSSREFS

Intersects with A167251, A167254, A167255, A167258.
Sequence in context: A261496 A006121 A110951 * A265942 A120597 A256832
Adjacent sequences: A172474 A172475 A172476 * A172478 A172479 A172480


KEYWORD

nonn


AUTHOR

Johan de Ruiter, Feb 04 2010


EXTENSIONS

a(9) from Bob Harris (me13013(AT)gmail.com), Mar 13 2010


STATUS

approved



