a(0)=0, a(1)=5, a(n)=a(n-1)+a(n-2)-1.

Terms

a(0) =0a(1) =5a(2) =4a(3) =8a(4) =11a(5) =18a(6) =28a(7) =45a(8) =72a(9) =116a(10) =187a(11) =302a(12) =488a(13) =789a(14) =1276a(15) =2064a(16) =3339a(17) =5402a(18) =8740a(19) =14141a(20) =22880a(21) =37020a(22) =59899a(23) =96918a(24) =156816a(25) =253733a(26) =410548a(27) =664280a(28) =1074827a(29) =1739106