A071409 Determinant of the n X n matrix m(i,j)=i^j+j^i.

2, 7, 80, 2692, -188160, 673763328, 53114341552128, 11442355482580107264, 101868843539003372580372480, -11188458083483956358422238173593600, 39367352051951445285669984261580278202368000

Offset: 1

Author

Benoit Cloitre, May 28 2002

Keywords

• easy
• sign

Comments

If n==0 mod 5 a(n) < 0

Programs

PARI

for(n=1,20,print1(matdet(matrix(n,n,i,j,i^j+j^i)),","))