56568

Appears in sequences

• Indices of triple-safe primes: p=prime(n) is double-safe: q=(p-1)/2, r=(q-1)/2 and s=(r-1)/2 are all prime (and q is double-safe).at n=35A075134
• Triangle read by rows, the coefficients of J. L. Fields generalized Bernoulli polynomials.at n=30A220412
• Number of strictly 2-connected graphs with n edges.at n=14A289470
• Numbers k such that 32 * 3^k - 1 is prime.at n=25A387197