OFFSET
1,2
PROG
(PARI) {a(n)=local(A); sum(k=1, n, if(k==1, A=n^2-n+1, A=(n-k+1)*floor((A-1)/(n-k+1))))}
CROSSREFS
KEYWORD
nonn
AUTHOR
Paul D. Hanna, Dec 01 2004
STATUS
approved