|
|
A089478
|
|
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 >= 0, 0 <= k <= A003432(n).
|
|
4
|
|
|
0, 1, 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;
refs;
listen;
history;
text;
internal format)
|
|
|
OFFSET
|
0,5
|
|
COMMENTS
|
|
|
LINKS
|
|
|
EXAMPLE
|
a(4) = T(2,1) = 3 because there are 3 different (0,1)-matrices with determinant=1:
((1,0),(0,1)), ((1,1),(0,1)), ((1,0),(1,1)).
Triangle T(n,k) begins:
0, 1;
1, 1;
10, 3;
338, 84, 3;
42976, 10020, 1200, 60;
21040112, 4851360, 1213920, 144720, 43560, 3600;
...
|
|
PROG
|
(Fortran)
|
|
CROSSREFS
|
The n-th row of the table contains A089472(n) nonzero entries.
|
|
KEYWORD
|
nonn,hard,tabf,changed
|
|
AUTHOR
|
|
|
EXTENSIONS
|
|
|
STATUS
|
approved
|
|
|
|