1905131520

Appears in sequences

• a(n) = 4^n*(3*n)!/((2*n)!*n!).at n=7A006588
• a(n) = 2^(n-7)*binomial(n,7). Number of 7D hypercubes in an n-dimensional hypercube.at n=14A054851
• Maximum number of pairwise incomparable subcubes of the discrete n-cube. Largest antichain in partial ordering {0,1,*}^n where 0 and 1 are less than *. Maximum number of implicants in an irredundant disjunctive normal form for n Boolean variables.at n=21A109388