a(n) = ((2+sqrt(3))*(4+sqrt(3))^n + (2-sqrt(3))*(4-sqrt(3))^n)/2.
A162274
a(n) = ((2+sqrt(3))*(4+sqrt(3))^n + (2-sqrt(3))*(4-sqrt(3))^n)/2.
Terms
- a(0) =2a(1) =11a(2) =62a(3) =353a(4) =2018a(5) =11555a(6) =66206a(7) =379433a(8) =2174786a(9) =12465659a(10) =71453054a(11) =409570865a(12) =2347677218a(13) =13456996499a(14) =77136168158a(15) =442148390777
External references
- oeis: A162274