Jul
6
revised Recurrence Master Theorem Question with asymptotic Upper and Lower Bounds
mt prediction
Jul
6
answered Recurrence Master Theorem Question with asymptotic Upper and Lower Bounds
Jul
6
comment Number of rooted subtrees of given size in infinite d-regular tree
There is no problem replacing $D-1$ by $D$ if you believe this is the correct problem definition, which I might have misunderstood. (I do prefer leaving my post as is.) The calculation goes through the same way. As for the method I suggest you start reading at Wikipedia Symbolic Combinatorics and Wikipedia Lagrange Inversion.
Jul
4
revised Number of rooted subtrees of given size in infinite d-regular tree
spell me
Jul
4
revised Number of rooted subtrees of given size in infinite d-regular tree
formatting
Jul
4
revised Number of rooted subtrees of given size in infinite d-regular tree
LIF
Jul
4
revised Number of rooted subtrees of given size in infinite d-regular tree
intro
Jul
4
answered Number of rooted subtrees of given size in infinite d-regular tree
Jul
3
comment Number of ways, powers of $2$ sum up specific values
Wikipedia has this article. The operator $\mathfrak{M}$ represents unlabelled multisets, $\mathfrak{P}$ represents labelled / unlabelled sets and $\mathfrak{C}$ represents oriented labelled / unlabelled cycles.
Jul
2
awarded  Curious
Jul
2
awarded  Revival
Jul
2
revised Number of all labeled, unordered rooted trees with $n$ vertices and $k$ leaves.
spell
Jul
2
revised Number of all labeled, unordered rooted trees with $n$ vertices and $k$ leaves.
identity for B(z)
Jul
2
revised Number of all labeled, unordered rooted trees with $n$ vertices and $k$ leaves.
simple closed form
Jul
1
revised Number of all labeled, unordered rooted trees with $n$ vertices and $k$ leaves.
why y=1
Jul
1
comment Primitive binary necklaces
To @vonbrand, I was able to finish a computation that you started, it is at this MSE link.
Jul
1
answered Number of all labeled, unordered rooted trees with $n$ vertices and $k$ leaves.
Jun
28
answered Why is $\sum_{k=0}^{n} f(n,k) = F_{n+2}$?
Jun
28
answered Generating function of $a_n = \sum_{k = 0}^{\lfloor\frac{n}{2}\rfloor}{n \choose 2k}\frac{(2k)!}{k!2^k}$ is $e^{x+x^2/2}$?
Jun
28
revised What is the name of a graph made of k copies of a 4-cycle connected end to end in a chain, possibly with leaves?
language issue