104104

Appears in sequences

• Number of nonempty subsets of {1,2,...,n} in which exactly 1/6 of the elements are <= n/2.at n=26A047169
• Number of nonempty subsets of {1,2,...,n} in which exactly 1/6 of the elements are <= (n-1)/2.at n=26A047180
• Sum of all parts of all partitions of n.at n=28A066186
• Number of set partitions of {1,...,n} with largest set of size 9.at n=5A229251
• 4n concatenated with itself.at n=25A248365
• G.f.: A(x,y) = (1-y)^2 * Sum_{n>=0} (2*n+1) * y^n * (1 + x*(1-y)^2 )^(n*(n+1)/2).at n=48A303650
• G.f.: A(x,y) = (1-y)^2 * Sum_{n>=0} (2*n+1) * y^n * (1 + x*(1-y)^2 )^(n*(n+1)/2).at n=49A303650
• Main diagonal of irregular triangle A303650.at n=6A303651
• a(n) is the number of subsets of {1..n} that contain 3 even and 3 odd numbers.at n=27A331574
• Numbers that are the sum of four third powers in exactly ten ways.at n=33A345156
• Number of 2 X 2 square tiles in a discrete 4-dimensional hypercube of side length n.at n=13A387286