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A306840 - OEIS
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A306840
Number of singular n X n matrices with elements {0, 1, 2}.
1
1, 31, 6891, 12202161, 175419087483, 20540753180392401
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OFFSET
1,2
LINKS
Table of n, a(n) for n=1..6.
S. E. Thornton,
Properties of the Bohemian family of n x n matrices with population {0, 1, 2}
, Characteristic Polynomial Database.
Minfeng Wang,
C++ program to calculate A306840
CROSSREFS
Number of non-singular matrices is in
A197487
.
Sequence in context:
A297767
A065756
A263378
*
A212858
A337678
A059384
Adjacent sequences:
A306837
A306838
A306839
*
A306841
A306842
A306843
KEYWORD
nonn
,
more
,
hard
AUTHOR
Steven E. Thornton
, Mar 12 2019
EXTENSIONS
a(6) from
Minfeng Wang
, May 29 2024
STATUS
approved
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Last modified September 7 13:04 EDT 2024. Contains 375730 sequences. (Running on oeis4.)