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A328020
Number of distinct tilings of an n X n square with free n-polyominoes.
5
1, 1, 2, 22, 515, 56734, 19846102, 23437350133
OFFSET
1,3
CROSSREFS
KEYWORD
nonn,hard,more,nice
AUTHOR
Jeff Bowermaster, Oct 01 2019
EXTENSIONS
a(7) from Peter Kagey, Oct 10 2019, based on the Stack Exchange link.
a(8) from Christian Sievers, Oct 13 2019, based on the Stack Exchange link.
STATUS
approved