Number of 1's in all compositions of n into odd parts.

Terms

a(0) =0a(1) =1a(2) =2a(3) =3a(4) =6a(5) =11a(6) =20a(7) =36a(8) =64a(9) =113a(10) =198a(11) =345a(12) =598a(13) =1032a(14) =1774a(15) =3039a(16) =5190a(17) =8839a(18) =15016a(19) =25452a(20) =43052a(21) =72685a(22) =122502a(23) =206133a(24) =346346a(25) =581136a(26) =973850a(27) =1630011a(28) =2725254a(29) =4551683