a(n) = 10*a(n-1) - (-1)^n * n, a(1) = 1.
A179980
a(n) = 10*a(n-1) - (-1)^n * n, a(1) = 1.
Terms
- a(0) =1a(1) =8a(2) =83a(3) =826a(4) =8265a(5) =82644a(6) =826447a(7) =8264462a(8) =82644629a(9) =826446280a(10) =8264462811a(11) =82644628098a(12) =826446280993
External references
- oeis: A179980