Number of compositions of n with distinct first quotients.

Terms

a(0) =1a(1) =1a(2) =2a(3) =3a(4) =7a(5) =13a(6) =19a(7) =36a(8) =67a(9) =114a(10) =197a(11) =322a(12) =564a(13) =976a(14) =1614a(15) =2729a(16) =4444a(17) =7364a(18) =12357a(19) =20231a(20) =33147a(21) =53973a(22) =87254a(23) =140861a(24) =227535a(25) =368050a(26) =589706a(27) =940999a(28) =1497912a(29) =2378260