Number of compositions (ordered partitions) of n into distinct parts, the least being 2.

Terms

a(0) =0a(1) =0a(2) =1a(3) =0a(4) =0a(5) =2a(6) =2a(7) =2a(8) =2a(9) =8a(10) =8a(11) =14a(12) =14a(13) =20a(14) =44a(15) =50a(16) =74a(17) =104a(18) =128a(19) =158a(20) =326a(21) =356a(22) =524a(23) =698a(24) =986a(25) =1160a(26) =1592a(27) =2606a(28) =3158a(29) =4316