The On-Line Encyclopedia of Integer Sequences (OEIS)

Revision History for A317541 (Bold, blue-underlined text is an addition; faded, red-underlined text is a ~~deletion~~.)
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A317541

Number of tilings of a sphinx of order n with n^2 - 2 elementary sphinxes and a single sphinx domino that has two different tilings.
(history; published version)

#59 by N. J. A. Sloane at Sat Sep 15 15:55:20 EDT 2018

STATUS

proposed

approved

#58 by Michel Marcus at Sat Sep 08 10:11:34 EDT 2018

STATUS

editing

proposed

#57 by Michel Marcus at Sat Sep 08 10:10:19 EDT 2018

COMMENTS

Combining the 12 aspects of the sphinx tile produces 46 sphinx dominoes. Sphinx domino tiling is compared with sphinx tiling in the order 4 sphinx (see link below)._ - _Craig Knecht_, Sep 08 2018

STATUS

proposed

editing

#56 by Craig Knecht at Sat Sep 08 07:07:37 EDT 2018

STATUS

editing

proposed

#55 by Craig Knecht at Sat Sep 08 07:01:02 EDT 2018

LINKS

Craig Knecht, <a href="/A317541/a317541_17.png">Domino sphinx tiling.</a>

Discussion

Sat Sep 08

07:06

Craig Knecht: I believe this is the first time the 46 sphinx dominoes have been defined.  Sphinx tiling is brought into focus by color coding the 12 sphinx tile aspects, noting small shapes that have multiple tilings and now sphinx domino tiling.

#54 by Craig Knecht at Sat Sep 08 06:59:47 EDT 2018

COMMENTS

Combining the 12 aspects of the sphinx tile produces 46 sphinx dominoes. Sphinx domino tiling is compared with sphinx tiling in the order 4 sphinx (see link below).Craig Knecht, Sep 08 2018

LINKS

Craig Knecht, <a href="/A317541/a317541_17.png">Domino sphinx tiling.</a>

STATUS

approved

editing

#53 by Alois P. Heinz at Thu Aug 16 23:56:22 EDT 2018

STATUS

reviewed

approved

#52 by Michael B. Porter at Thu Aug 16 23:47:30 EDT 2018

STATUS

proposed

reviewed

#51 by Craig Knecht at Wed Aug 15 05:54:53 EDT 2018

STATUS

editing

proposed

#50 by Craig Knecht at Wed Aug 15 05:50:29 EDT 2018

LINKS

Craig Knecht, <a href="/A317541/a317541_16.png">Order 4 Sphinx.</a>