A318897 Number of tilings of the even-order sphinx with the two dominoes that form the second-order sphinx.

1, 8, 5433, 28925040

Offset: 1

Author

Craig Knecht, Sep 05 2018

Keywords

• nonn
• more

Comments

There are 46 sphinx dominoes. The order 2 sphinx is composed of two different dominoes. These two dominoes are used to tile the even-order sphinx.

The orientation of the order 8 sphinx in the link below is essential for the bit-vector bottom-up search to efficiently find solutions. All order 8 solutions are found in a few minutes.

Links

• Craig Knecht, 46 sphinx dominoes.
• Craig Knecht, Sphinx domino introduction.
• Craig Knecht, Sphinx domino tiling.
• Craig Knecht, T12 missing one of the fundamental two dominoes.

Crossrefs

Cf. A279887, A317541.