a(n) = ((7 + sqrt(2))^n + (7 - sqrt(2))^n)/2.
A147958
a(n) = ((7 + sqrt(2))^n + (7 - sqrt(2))^n)/2.
Terms
- a(0) =1a(1) =7a(2) =51a(3) =385a(4) =2993a(5) =23807a(6) =192627a(7) =1577849a(8) =13036417a(9) =108350935a(10) =904201491a(11) =7566326929a(12) =63431106929a(13) =532418131343
External references
- oeis: A147958