Number of compositions of n having exactly seven fixed points.

Terms

a(0) =1a(1) =1a(2) =3a(3) =7a(4) =16a(5) =35a(6) =76a(7) =162a(8) =334a(9) =706a(10) =1457a(11) =2996a(12) =6130a(13) =12496a(14) =25383a(15) =51423a(16) =103937a(17) =209723a(18) =422418a(19) =849843a(20) =1707917a(21) =3429407a(22) =6881120a(23) =13798903a(24) =27657921a(25) =55414350a(26) =110989891a(27) =222243203a(28) =444916908a(29) =890536103