User:Marko Riedel

B.Sc. Computer Science from UBC 1994, M.Sc. Computer Science from University of Toronto 1996.

Home page is here.

Some sequences that I contributed / modified:

• A000169, The tree function and Eulerian numbers of the second order
• A208539, Proper colorings of necklaces / bracelets
• A331951, Number of binary trees with n internal nodes that contain the subtree (Z, (Z, U, U), (Z, U, U))
• A332496, Triangular array T(n,k): the number of non-isomorphic colorings of K_n minus an edge using exactly k colors
• A331538, Number of functions f:1..n -> 1..n such that there exists a k such that |f^(-1)(k)| = k
• A331106, Number of plane trees of total weight n of combinatorial class T=Z*U + Z*T^2/(1-T) with nodes Z of weight one and leaves U of weight three
• A331013, Number of unlabeled bicolored bipartite graphs on 2n nodes having n nodes of each color with no edges between vertices of the same color and edges having two colors and allowing the node color classes to be interchanged. Edge colors are swappable (permuted by the symmetric group)
• A001263, Narayana numbers count unlabeled ordered rooted trees on n nodes having k leaves, proof
• A323875, Number of labeled graphs on n nodes with two connected components
• A323876, Number of labeled graphs on n nodes with three connected components
• A323877, Number of labeled graphs on n nodes with four connected components
• A143543, Triangle read by rows: T(n,k) = number of labeled graphs on n nodes with k connected components, 1<=k<=n.
• A056292, Necklace colorings with four swappable colors
• A002076, Necklace colorings with three swappable colors
• A306194, Non-isomorphic colorings of the edges of a cube using at most n colors under rotational symmetries and permutations of the colors
• A000009, Number of partitions into distinct parts
• A001429, Number of n-node connected unicyclic unlabelled graphs
• A321244, Non-isomorphic proper colorings of the 3 X 3 grid graph using at most n colors under rotational and reflectional symmetries
• A304482, Number A(n,k) of n-element subsets of 1..kn whose elements sum to a multiple of n
• A316093, Non-isomorphic colorings of the cube under rotations, using at most N colors on the faces and M colors on the vertices
• A244581, Multisets of multisets corresponding to integer partitions lambda, drawn from |lambda| symbols, where the sizes of the multisets are given by the elements of lambda as is the total number of occurrences of each symbol
• A294198, Labeled trees with at least one node of degree two
• A299104, A class of boolean functions under permutation / complementation of inputs, complementation of outputs
• A294198, Labeled trees with at least one node of degree two
• A298637, Generalized Catalan numbers (well-formed parentheses in words)
• A296143, Rows of beads under reflections and color swaps
• A294791, Colordings of the torus under rotational symmetry and swappable colors
• A292553, Number of rooted unlabeled trees on n nodes where each node has at most 8 children
• A007139, Number of unlabeled bicolored bipartite graphs on 2n nodes having n nodes of each color with no edges between vertices of the same color and allowing the color classes to be interchanged
• A284664, Number of proper colorings of the 2n-gon with 2 instances of each of n colors under rotational symmetry
• A283755, Number of non-isomorphic unlabeled connected graphs with loops on n nodes and with k edges
• A283153, Number of set partitions of unique elements from an n X 4 matrix where elements from the same row may not be in the same partition
• A281582, Number of rolls of a die with n sides that maximizes the average ratio of highest number of occurrences of a face value to lowest number
• A279514 Number of terms in the cycle index Z(S_n X S_n) of the Cartesian product of the symmetric group S_n with itself that contain q cycles, where 1 <= q <= n*n
• A277840 Number of finite automata with n states, n input symbols and two output symbols
• A277073 Number of n-node labeled graphs with two endpoints
• A274056 Number of unrooted labeled trees on 2n nodes with node degree either one or three