

A226979


Number of ways to cut an n X n square into squares with integer sides, reduced for symmetry, where the orbits under the symmetry group of the square, D4, have 2 elements.


8



0, 0, 0, 2, 2, 24, 36, 344, 504, 7657, 11978, 289829
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OFFSET

1,4


LINKS



FORMULA



EXAMPLE

For n=5, there are 2 dissections where the orbits under the symmetry group of the square, D4, have 2 elements.


CROSSREFS



KEYWORD

nonn,more


AUTHOR



EXTENSIONS

a(8)a(12) from Ed Wynn, Apr 01 2014


STATUS

approved



