Number of forests of labeled rooted trees of height at most 1, with n labels, where each root contains a nonempty set of labels of equal size, also row sums of A143398.
A143406
Number of forests of labeled rooted trees of height at most 1, with n labels, where each root contains a nonempty set of labels of equal size, also row sums of A143398.
Terms
- a(0) =1a(1) =1a(2) =4a(3) =14a(4) =55a(5) =252a(6) =1319a(7) =7737a(8) =50040a(9) =351636a(10) =2659375a(11) =21519027a(12) =185279186a(13) =1688183135a(14) =16206401020a(15) =163376811610
External references
- oeis: A143406