a(n) = (-1)^n * coefficient of x^n in Sum_{k>=1} x^(k-1)/(1+10*x^k).
A101563
a(n) = (-1)^n * coefficient of x^n in Sum_{k>=1} x^(k-1)/(1+10*x^k).
Terms
- a(0) =1a(1) =9a(2) =101a(3) =1009a(4) =10001a(5) =99909a(6) =1000001a(7) =10001009a(8) =100000101a(9) =999990009a(10) =10000000001a(11) =100000100909
External references
- oeis: A101563