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A342599
Number of n X n 01-matrices with permanent 0 from which it is possible to obtain a 01-matrix with permanent 1 by increasing a single element by 1, up to permutation of rows and columns.
1
1, 3, 12, 74, 788, 16016, 658220, 55598924
OFFSET
1,2
CROSSREFS
KEYWORD
nonn,more,hard
AUTHOR
Max Alekseyev, Mar 16 2021
EXTENSIONS
a(8) from Max Alekseyev, Feb 10 2022
STATUS
approved