OFFSET
1,1
COMMENTS
a(n) is the determinant of the n X n matrix M with M(i,i)=2i+n, M(i,j)=i+j.
MATHEMATICA
Table[n^n(n + 2 - (n^2 - 1)/12), {n, 1, 17}]
CROSSREFS
KEYWORD
easy,sign
AUTHOR
Mario Catalani (mario.catalani(AT)unito.it), Feb 13 2003
STATUS
approved