4694921

Appears in sequences

• Number of nonempty subsets of {1,2,...,n} in which exactly 1/3 of the elements are <= sqrt(n).at n=27A048094
• Number of inequivalent (modulo C_4 rotations) square n X n grids with squares coming in two colors and three squares have one of the colors.at n=20A275799
• Number of chiral pairs of colorings of the edges of a regular tetrahedron using n or fewer colors.at n=21A337899