a(n) = ((3+sqrt(3))*(4+sqrt(3))^n-(3-sqrt(3))*(4-sqrt(3))^n)/sqrt(12).
A161728
a(n) = ((3+sqrt(3))*(4+sqrt(3))^n-(3-sqrt(3))*(4-sqrt(3))^n)/sqrt(12).
Terms
- a(0) =1a(1) =7a(2) =43a(3) =253a(4) =1465a(5) =8431a(6) =48403a(7) =277621a(8) =1591729a(9) =9124759a(10) =52305595a(11) =299822893a(12) =1718610409a(13) =9851185663a(14) =56467549987a(15) =323674986277
External references
- oeis: A161728