11099088

Appears in sequences

• a(n) = (2n)!(2n+1)!/n!^4, or equally (2n+1)*binomial(2n,n)^2.at n=6A000515
• Triangle read by rows: T(n,k) (1 <= k <= n) is the sum of the entries in the lower right k X k submatrix of the n X n inverse Hilbert matrix.at n=21A144630
• Triangular table read by rows: T(n,k) is the k-th entry of the main diagonal of the inverse Hilbert matrix of order n.at n=27A348419
• a(n) is the smallest number that has exactly n divisors that are cyclops numbers (A134808).at n=27A357033