Number of compositions of n into odd blocks with one element in each block distinguished.

Terms

a(0) =1a(1) =1a(2) =4a(3) =7a(4) =15a(5) =32a(6) =65a(7) =137a(8) =284a(9) =591a(10) =1231a(11) =2560a(12) =5329a(13) =11089a(14) =23076a(15) =48023a(16) =99935a(17) =207968a(18) =432785a(19) =900633a(20) =1874236a(21) =3900319a(22) =8116639a(23) =16890880a(24) =35150241a(25) =73148321a(26) =152223044a(27) =316779047a(28) =659223215a(29) =1371856032