57904

Appears in sequences

• Whitney number of level n of the lattice of the ideals of the fence of order 2 n + 1.at n=13A051291
• Largest Whitney number of Fibonacci lattices J(Z_n).at n=27A077419
• T(n,k) is the number of n-step one or two collinear space at a time queen's tours on a k X k board summed over all starting positions.at n=52A187027
• The number of ways to write an n-bit binary string and then define each run of ones as an element in an equivalence relation, and each run of zeros as an element in a second equivalence relation.at n=10A253409