a(n) = ( (5 + 2*sqrt(2))^n - (5 - 2*sqrt(2))^n )/(4*sqrt(2)).
A154340
a(n) = ( (5 + 2*sqrt(2))^n - (5 - 2*sqrt(2))^n )/(4*sqrt(2)).
Terms
- a(0) =1a(1) =10a(2) =83a(3) =660a(4) =5189a(5) =40670a(6) =318487a(7) =2493480a(8) =19520521a(9) =152816050a(10) =1196311643a(11) =9365243580a(12) =73315137869a(13) =573942237830
External references
- oeis: A154340