Total sum of odd parts in all compositions of n.

Terms

a(0) =1a(1) =2a(2) =8a(3) =18a(4) =48a(5) =110a(6) =260a(7) =586a(8) =1320a(9) =2918a(10) =6412a(11) =13954a(12) =30192a(13) =64926a(14) =138964a(15) =296122a(16) =628664a(17) =1330134a(18) =2805916a(19) =5903090a(20) =12388736a(21) =25942542a(22) =54215268a(23) =113090858a(24) =235502408a(25) =489646150a(26) =1016575020a(27) =2107715426a(28) =4364561680a(29) =9027384958