|
| |
|
|
A127235
|
|
a(n) = n! (2*sum(1..n-1))!.
|
|
2
| | |
|
|
|
OFFSET
| 1,2
|
|
|
COMMENTS
| Number of distinct n x n matrices containing n^2 different elements which have that same trace.
|
|
|
MATHEMATICA
| Table[n! (2*Sum[x, {x, 1, n - 1}])!, {n, 1, 10}]
|
|
|
CROSSREFS
| Cf. A127233, A127234.
Sequence in context: A067482 A013830 A079682 * A203036 A102205 A046360
Adjacent sequences: A127232 A127233 A127234 * A127236 A127237 A127238
|
|
|
KEYWORD
| nonn
|
|
|
AUTHOR
| Artur Jasinski (grafix(AT)csl.pl), Jan 09 2007, Jan 11 2007
|
| |
|
|
