Number of labeled acyclic digraphs with n nodes containing exactly n-2 points of in-degree zero.
A060337
Number of labeled acyclic digraphs with n nodes containing exactly n-2 points of in-degree zero.
Terms
- a(0) =15a(1) =198a(2) =1610a(3) =10575a(4) =61845a(5) =336924a(6) =1751076a(7) =8801325a(8) =43141175a(9) =207347778a(10) =980828238a(11) =4578689115a(12) =21135851625a(13) =96628899960a(14) =438068838536
External references
- oeis: A060337