A213378 Number of polyominoes of order 2n that can be tiled by dominoes in more than one way.

0, 1, 3, 41, 499, 6946, 95964, 1330807, 18395673

Offset

1,3

Comments

Tilings related by a symmetry of the polyomino that is not a symmetry of the tiling count as distinct (thus, the square tetromino counts as being tiled in two distinct ways).

Links

Table of n, a(n) for n=1..9.

Crossrefs

Cf. A056785, A056786, A213376, A213377.

Sequence in context: A328509 A087544 A305667 * A189356 A155672 A073844

Adjacent sequences: A213375 A213376 A213377 * A213379 A213380 A213381

Keyword

hard,more,nonn

Author

Joseph Myers, Jun 10 2012

Status

approved