Difference between ceiling(e^(n/2 - 1)) (A005181) and the n-th Fibonacci number (A000045).

Terms

a(0) =1a(1) =0a(2) =0a(3) =0a(4) =0a(5) =0a(6) =0a(7) =0a(8) =0a(9) =0a(10) =0a(11) =2a(12) =5a(13) =12a(14) =27a(15) =56a(16) =110a(17) =212a(18) =397a(19) =734a(20) =1339a(21) =2414a(22) =4316a(23) =7659a(24) =13507a(25) =23691a(26) =41362a(27) =71920a(28) =124603a(29) =215188