Number of compositions (ordered partitions) of n into distinct parts >= 4.

Terms

a(0) =1a(1) =0a(2) =0a(3) =0a(4) =1a(5) =1a(6) =1a(7) =1a(8) =1a(9) =3a(10) =3a(11) =5a(12) =5a(13) =7a(14) =7a(15) =15a(16) =15a(17) =23a(18) =29a(19) =37a(20) =43a(21) =57a(22) =87a(23) =101a(24) =137a(25) =175a(26) =235a(27) =279a(28) =363a(29) =431