Number of ways to choose a strict rooted partition of each part in a rooted partition of n.

Terms

a(0) =1a(1) =1a(2) =2a(3) =3a(4) =6a(5) =9a(6) =16a(7) =25a(8) =43a(9) =66a(10) =108a(11) =166a(12) =269a(13) =408a(14) =643a(15) =975a(16) =1517a(17) =2277a(18) =3497a(19) =5223a(20) =7936a(21) =11803a(22) =17736a(23) =26219a(24) =39174a(25) =57594a(26) =85299a(27) =124957a(28) =183987a(29) =268158