a(n) = n * Fibonacci(n) - Sum_{i=0..n} Fibonacci(i).

Terms

a(0) =0a(1) =0a(2) =0a(3) =2a(4) =5a(5) =13a(6) =28a(7) =58a(8) =114a(9) =218a(10) =407a(11) =747a(12) =1352a(13) =2420a(14) =4292a(15) =7554a(16) =13209a(17) =22969a(18) =39748a(19) =68494a(20) =117590a(21) =201210a(22) =343275a(23) =584087a(24) =991440a(25) =1679208a(26) =2838408a(27) =4789058a(28) =8066669a(29) =13566373