Number of compositions of n where the smallest part is smaller than the number of parts.

Terms

a(0) =0a(1) =1a(2) =3a(3) =6a(4) =13a(5) =28a(6) =59a(7) =122a(8) =248a(9) =501a(10) =1009a(11) =2028a(12) =4070a(13) =8159a(14) =16343a(15) =32717a(16) =65472a(17) =130991a(18) =262041a(19) =524157a(20) =1048410a(21) =2096943a(22) =4194043a(23) =8388285a(24) =16776819a(25) =33553946a(26) =67108270a(27) =134217002a(28) =268434568a(29) =536869825