a(n) = ((5+sqrt(2))*(3+sqrt(2))^n + (5-sqrt(2))*(3-sqrt(2))^n)/2.
A162270
a(n) = ((5+sqrt(2))*(3+sqrt(2))^n + (5-sqrt(2))*(3-sqrt(2))^n)/2.
Terms
- a(0) =5a(1) =17a(2) =67a(3) =283a(4) =1229a(5) =5393a(6) =23755a(7) =104779a(8) =462389a(9) =2040881a(10) =9008563a(11) =39765211a(12) =175531325a(13) =774831473a(14) =3420269563a(15) =15097797067a(16) =66644895461a(17) =294184793297
External references
- oeis: A162270