| NAME
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allocatedDeterminants of symmetric real {0,1}-matrices of order 9 that only occur foras Hugopositive Pfoertnervalues.
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| DATA
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89, 94, 95, 97, 98, 99, 101, 102, 105, 110, 116, 125, 144
|
| OFFSET
|
1,1
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| COMMENTS
|
The non-occurrence of the corresponding negative determinants causes the difference A089472(9) - A118985(9) = 227 - 214 = 13.
A similar situation already occurs for 7 X 7 matrices, where the 3 determinant values -20, -24, -32 only occur with negative signs.
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| LINKS
|
Hugo Pfoertner, <a href="/A373915/a373915.txt">Examples of 9 X 9 matrices with determinants = a(n)</a>.
|
| CROSSREFS
|
Cf. A003432, A089472, A108150, A118985.
|
| KEYWORD
|
allocated
nonn,fini,full
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| AUTHOR
|
Hugo Pfoertner, Jun 23 2024
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| STATUS
|
approved
editing
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|