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A342598
Number of n X n 01-matrices with zero permanent from which it is possible to obtain a 01-matrix with permanent 1 by increasing a single element by 1.
1
1, 8, 216, 19584, 5542200, 4551802560, 10225942680240, 60077099766620160
OFFSET
1,2
COMMENTS
a(n) <= n * A089482(n).
CROSSREFS
KEYWORD
nonn,more,hard
AUTHOR
Max Alekseyev, Mar 16 2021
EXTENSIONS
a(8) from Max Alekseyev, Feb 10 2022
STATUS
approved