a(n) = Fibonacci(2*n+1) + 2*Fibonacci(2*n-1) - 2^n - [n = 0], where [b] is the Iverson bracket of b.
A084086
a(n) = Fibonacci(2*n+1) + 2*Fibonacci(2*n-1) - 2^n - [n = 0], where [b] is the Iverson bracket of b.
Terms
- a(0) =1a(1) =2a(2) =5a(3) =15a(4) =44a(5) =125a(6) =347a(7) =948a(8) =2561a(9) =6863a(10) =18284a(11) =48501a(12) =128243a(13) =338276a(14) =890681a(15) =2341959a(16) =6151580a(17) =16145549a(18) =42350603a(19) =111037332a(20) =291023537a(21) =762557567a(22) =1997697740a(23) =5232632805a(24) =13704394979a(25) =35888940740a(26) =93979204457a(27) =246082227063a(28) =644334585596
External references
- oeis: A084086