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A306840
Number of singular n X n matrices with elements {0, 1, 2}.
1
1, 31, 6891, 12202161, 175419087483, 20540753180392401
OFFSET
1,2
CROSSREFS
Number of non-singular matrices is in A197487.
Sequence in context: A297767 A065756 A263378 * A212858 A337678 A059384
KEYWORD
nonn,more,hard
AUTHOR
Steven E. Thornton, Mar 12 2019
EXTENSIONS
a(6) from Minfeng Wang, May 29 2024
STATUS
approved