a(n) = 6*a(n-1)-a(n-2) for n > 2; a(1)=17, a(2)=65.
A156570
a(n) = 6*a(n-1)-a(n-2) for n > 2; a(1)=17, a(2)=65.
Terms
- a(0) =17a(1) =65a(2) =373a(3) =2173a(4) =12665a(5) =73817a(6) =430237a(7) =2507605a(8) =14615393a(9) =85184753a(10) =496493125a(11) =2893773997a(12) =16866150857a(13) =98303131145a(14) =572952636013
External references
- oeis: A156570