28045

Appears in sequences

• Hodge structure on relative homology of some varieties related to cluster algebras of type A.at n=50A196019
• Number of n X 2 binary arrays indicating whether each 2 X 2 subblock of a larger binary array has lexicographically increasing rows and columns, for some larger (n+1) X 3 binary array with rows and columns of the latter in lexicographically nondecreasing order.at n=18A227085
• The Wiener index of the graph obtained by applying Mycielski's construction to a benzenoid consisting of a linear chain of n hexagons.at n=16A228597
• Number of length 4 arrays x(i), i=1..4 with x(i) in i..i+n and no value appearing more than 2 times.at n=11A250353
• Squarefree terms of A276655.at n=32A276756