Number of ways to choose a strict composition of each part of a strict composition of n.

Terms

a(0) =1a(1) =1a(2) =1a(3) =5a(4) =9a(5) =17a(6) =45a(7) =81a(8) =181a(9) =397a(10) =965a(11) =1729a(12) =3673a(13) =7313a(14) =15401a(15) =34065a(16) =68617a(17) =135069a(18) =266701a(19) =556969a(20) =1061921a(21) =2434385a(22) =4436157a(23) =9120869a(24) =17811665a(25) =35651301a(26) =68949549a(27) =136796317a(28) =283612973a(29) =537616261