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

Terms

a(0) =1a(1) =1a(2) =2a(3) =4a(4) =7a(5) =13a(6) =25a(7) =43a(8) =77a(9) =137a(10) =241a(11) =410a(12) =720a(13) =1209a(14) =2073a(15) =3498a(16) =5883a(17) =9768a(18) =16413a(19) =26978a(20) =44741a(21) =73460a(22) =120462a(23) =196066a(24) =320389a(25) =518118a(26) =839325a(27) =1353283a(28) =2178764a(29) =3490105