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A213377 Number of polyominoes of order 2n that can be tiled by dominoes in a unique way. 3
1, 3, 20, 170, 1728, 18878, 214278, 2488176, 29356463 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

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, A213378.

Sequence in context: A276315 A145329 A051643 * A216583 A154644 A000891

Adjacent sequences:  A213374 A213375 A213376 * A213378 A213379 A213380

KEYWORD

hard,more,nonn

AUTHOR

Joseph Myers, Jun 10 2012

STATUS

approved

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Last modified September 23 21:16 EDT 2017. Contains 292391 sequences.