OFFSET
0,2
FORMULA
G.f.: Sum_{k>0} 10^(k-1)*x^k/(1-10^(k-1)*x^k).
PROG
(PARI) a(n)=if(n<1, 0, 10^n*polcoeff(sum(k=1, n, 10/(10-x^k), x*O(x^n)), n))
CROSSREFS
KEYWORD
easy,nonn
AUTHOR
Paul Barry, Nov 11 2005
STATUS
approved