a(n) = ((9 + sqrt(2))^n + (9 - sqrt(2))^n)/2.
A147960
a(n) = ((9 + sqrt(2))^n + (9 - sqrt(2))^n)/2.
Terms
- a(0) =1a(1) =9a(2) =83a(3) =783a(4) =7537a(5) =73809a(6) =733139a(7) =7365591a(8) =74662657a(9) =762046137a(10) =7818480563a(11) =80531005311a(12) =831898131121
External references
- oeis: A147960