a(n) = 11*a(n-1) - 22*a(n-2), a(0)=0, a(1)=1.
A190870
a(n) = 11*a(n-1) - 22*a(n-2), a(0)=0, a(1)=1.
Terms
- a(0) =0a(1) =1a(2) =11a(3) =99a(4) =847a(5) =7139a(6) =59895a(7) =501787a(8) =4201967a(9) =35182323a(10) =294562279a(11) =2466173963a(12) =20647543455a(13) =172867150819
External references
- oeis: A190870