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Search: id:A089478
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| A089478 |
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Triangle T(n,k) read by rows, where T(n,k) = number of times the determinant of a real n X n (0,1)-matrix takes the value k, for n >= 1, 0 <= k <= A003432(n). |
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+0
2
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| 1, 1, 10, 3, 338, 84, 3, 42976, 10020, 1200, 60, 21040112, 4851360, 1213920, 144720, 43560, 3600, 39882864736, 9240051240, 3868663680, 768723480, 418703040, 63612360, 46569600, 6438600, 5014800, 529200, 292604283435872
(list; graph; listen)
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OFFSET
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1,3
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COMMENT
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The first 4 rows were provided by Wouter Meeussen (wouter.meeussen(AT)pandora.be).
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EXAMPLE
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a(4)=T(2,1)=3 because there are 3 different (0,1)-matrices with det=1:
((1,0),(0,1)), ((1,1),(0,1)), ((1,0),(1,1))
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PROGRAM
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See link in A086264.
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CROSSREFS
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Cf. T(n, 0)=A046747(n), T(n, 1)=A086264(n), T(n, A003432(n))=A051752(n). The n-th row of the table contains A089472(n) nonzero entries.
Sequence in context: A165790 A077194 A038305 this_sequence A028967 A097530 A063565
Adjacent sequences: A089475 A089476 A089477 this_sequence A089479 A089480 A089481
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KEYWORD
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hard,nonn,tabf
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AUTHOR
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Hugo Pfoertner (hugo(AT)pfoertner.org), Nov 04 2003
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