4756752

Appears in sequences

• Expansion of generating function A_{UU}^(2)(4n;2,1,1).at n=4A059488
• Sigma((8^n - 1)/7), where sigma(n) is the sum of positive divisors of n.at n=7A103968
• Triangle T(n,m)=m*n*binomial(m+n,m)^2/(2*(m+n)) read by rows.at n=26A131635
• Triangular array read by row: T(m,n) = number of ways to obtain a single sphere by gluing the (labeled) sides of a (2m+1)-gon and a (2n+1)-gon, m >= n >= 0.at n=26A297897
• a(n) is the smallest number that has exactly n divisors that are cyclops numbers (A134808).at n=24A357033