a(n) = 6*a(n-1)-a(n-2) for n > 2; a(1)=23, a(2)=115.
A156568
a(n) = 6*a(n-1)-a(n-2) for n > 2; a(1)=23, a(2)=115.
Terms
- a(0) =23a(1) =115a(2) =667a(3) =3887a(4) =22655a(5) =132043a(6) =769603a(7) =4485575a(8) =26143847a(9) =152377507a(10) =888121195a(11) =5176349663a(12) =30169976783a(13) =175843511035
External references
- oeis: A156568