|
| |
|
|
A086815
|
|
a(n)=(n-1)*n^(2*n)
|
|
0
| |
|
|
0, 16, 1458, 196608, 39062500, 10883911680, 4069338437094, 1970324836974592, 1200757082375992968, 900000000000000000000, 814027493868397611133210, 874465319237299285467856896, 1100799962319223399900795392108
(list; graph; refs; listen; history; internal format)
|
|
|
|
OFFSET
| 1,2
|
|
|
COMMENTS
| (-1)*determinant of the 2n X 2n matrix M_(i,j)=j if (i+j) is multiple of n, M_(i,j)=i otherwise.
|
|
|
EXAMPLE
| For n=3 the matrix is : [1 2 1 1 5 1], [1 2 2 4 2 2], [3 3 3 3 3 6], [4 2 4 4 5 4], [1 5 5 4 5 5], [6 6 3 6 6 6]
|
|
|
PROG
| (PARI) a(n)=(n-1)*n^(2*n)
|
|
|
CROSSREFS
| Cf. A062206.
Sequence in context: A160251 A106176 A193128 * A180504 A178024 A054947
Adjacent sequences: A086812 A086813 A086814 * A086816 A086817 A086818
|
|
|
KEYWORD
| nonn
|
|
|
AUTHOR
| Benoit Cloitre (benoit7848c(AT)orange.fr), Aug 06 2003
|
| |
|
|
