Number of odd-length twice-partitions of n into odd-length partitions.

Terms

a(0) =0a(1) =1a(2) =1a(3) =3a(4) =3a(5) =8a(6) =11a(7) =24a(8) =35a(9) =74a(10) =109a(11) =213a(12) =336a(13) =624a(14) =986a(15) =1812a(16) =2832a(17) =5002a(18) =7996a(19) =13783a(20) =21936a(21) =37528a(22) =59313a(23) =99598a(24) =158356a(25) =262547a(26) =415590a(27) =684372a(28) =1079576a(29) =1759984