

A291809


Number of tilings of n X n square using differently sized polyominoes.


6




OFFSET

1,2


COMMENTS

The sequence gives the number of distinct tilings by polyominoes of a square with side n, considering tilings that are formed by polyominoes of all different sizes. As for "free" polyominoes, tilings that are reflections or rotations of each other are not considered distinct.


LINKS



CROSSREFS

Cf. A268416 (polyominoes that will fit in nsided square), A291806 (polyomino tilings of square), A291807 (symmetric tilings), A291808 (tilings with distinct polyominoes).


KEYWORD

nonn,more


AUTHOR



STATUS

approved



