Number of twice-partitions of n of odd length.

Terms

a(0) =0a(1) =1a(2) =2a(3) =4a(4) =7a(5) =15a(6) =32a(7) =61a(8) =121a(9) =260a(10) =498a(11) =967a(12) =1890a(13) =3603a(14) =6839a(15) =12972a(16) =23883a(17) =44636a(18) =82705a(19) =150904a(20) =275635a(21) =501737a(22) =905498a(23) =1628293a(24) =2922580a(25) =5224991a(26) =9296414a(27) =16482995a(28) =29125140a(29) =51287098