

A264667


Number of optimal solutions to the maximal number of diagonals problem studied in A264041.


1



2, 4, 28, 108, 2, 13968, 480, 7914054, 433284, 18726123500, 256, 178290006448984, 14454384, 6631290958957860856, 1401615406696, 941558205279187913101914, 1767136, 500995759754153499284692617816, 31163356068736, 984452644453618816989710782436259368
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OFFSET

1,1


COMMENTS

Solutions that differ by a rotation and/or reflection are counted as different.  N. J. A. Sloane, Nov 20 2015
The paper by Boyland et al. gives a(13) = 14454384 and a(15) = 1401615406696.  Eric M. Schmidt, Aug 30 2017


LINKS



EXAMPLE

For n=2 the 4 solutions are:
.\
\\

/.
//

\\
\.

//
./

where the dot indicates an empty cell.


CROSSREFS



KEYWORD

nonn


AUTHOR



EXTENSIONS



STATUS

approved



