Number of compositions of n with at most one even part.

Terms

a(0) =1a(1) =1a(2) =2a(3) =4a(4) =7a(5) =13a(6) =23a(7) =41a(8) =72a(9) =126a(10) =219a(11) =379a(12) =653a(13) =1121a(14) =1918a(15) =3272a(16) =5567a(17) =9449a(18) =16003a(19) =27049a(20) =45636a(21) =76866a(22) =129267a(23) =217079a(24) =364057a(25) =609793a(26) =1020218a(27) =1705036a(28) =2846647a(29) =4748101