Number of unordered unilabeled-bilabeled increasing trees.
A261002
Number of unordered unilabeled-bilabeled increasing trees.
Terms
- a(0) =1a(1) =2a(2) =4a(3) =14a(4) =66a(5) =392a(6) =2806a(7) =23490a(8) =225104a(9) =2429538a(10) =29159162a(11) =385196964a(12) =5553689194a(13) =86776290538
External references
- oeis: A261002