Number of overcompositions of n minus the number of compositions of n.

Terms

a(0) =0a(1) =1a(2) =2a(3) =8a(4) =18a(5) =44a(6) =112a(7) =260a(8) =600a(9) =1346a(10) =3064a(11) =6784a(12) =15020a(13) =32812a(14) =71328a(15) =154320a(16) =332026a(17) =711500a(18) =1518384a(19) =3229044a(20) =6843256a(21) =14464760a(22) =30487496a(23) =64112960a(24) =134515472a(25) =281671698a(26) =588680628a(27) =1228211140a(28) =2558366188a(29) =5321151540