a(1)=10; a(n)=a(n-1)*10 -/+ 1 (alternating).
A179557
a(1)=10; a(n)=a(n-1)*10 -/+ 1 (alternating).
Terms
- a(0) =10a(1) =99a(2) =991a(3) =9909a(4) =99091a(5) =990909a(6) =9909091a(7) =99090909a(8) =990909091a(9) =9909090909a(10) =99090909091a(11) =990909090909
External references
- oeis: A179557