Number of finite sets of positive integers whose right half (exclusive) sums to n.

Terms

a(0) =1a(1) =0a(2) =1a(3) =3a(4) =6a(5) =10a(6) =15a(7) =22a(8) =29a(9) =41a(10) =50a(11) =70a(12) =81a(13) =113a(14) =126a(15) =176a(16) =191a(17) =264a(18) =286a(19) =389a(20) =413a(21) =569a(22) =595a(23) =798a(24) =861a(25) =1121a(26) =1187a(27) =1585a(28) =1653a(29) =2132