829920

Appears in sequences

• Number of nonseparable tree-rooted planar maps with n + 4 edges and 5 vertices.at n=5A006413
• Denominators of continued fraction convergents to sqrt(31).at n=15A041051
• Numbers that can be expressed as the difference of the squares of primes in exactly eleven distinct ways.at n=25A092007
• y-values in the solution to x^2 - 31*y^2 = 1.at n=2A174771
• Triangle T(n,k) read by rows: the number of n X n {0,1} matrices with trace k where each row sum and each column sum is 2.at n=29A284989
• Both k and its reverse are one less than a square.at n=19A287389
• Triangle read by rows: T(n,k) is the number of nonseparable tree-rooted planar maps with n edges and k faces, n >= 0, k = 1..n+1.at n=59A342984
• Triangle read by rows: T(n,k) is the number of nonseparable tree-rooted planar maps with n edges and k faces, n >= 0, k = 1..n+1.at n=61A342984