Number of forests of labeled rooted trees of height at most 1, with n labels, where any root may contain >= 1 labels, also row sums of A143395, A143396 and A143397.
A143405
Number of forests of labeled rooted trees of height at most 1, with n labels, where any root may contain >= 1 labels, also row sums of A143395, A143396 and A143397.
Terms
- a(0) =1a(1) =1a(2) =4a(3) =17a(4) =89a(5) =552a(6) =3895a(7) =30641a(8) =265186a(9) =2497551a(10) =25373097a(11) =276105106a(12) =3199697517a(13) =39297401197a(14) =509370849148
External references
- oeis: A143405