2-adic behavior of numbers of domino tilings
2-cancellative hypergraphs and codes
2-Dimension from the topological viewpoint
2-distance-transitive digraphs preserving a cartesian decomposition
2-enumerations of halved alternating sign matrices
2-generated Cayley digraphs on nilpotent groups have hamiltonian paths
2-Log-concavity of the Boros-Moll Polynomials
2-pile Nim with a Restricted Number of Move-size Imitations
2-stack sortable permutations with a given number of runs
231-Avoiding Involutions and Fibonacci Numbers