157211

Properties

Appears in sequences

• Number of bicentered trees with n nodes.at n=19A000677
• Primes of the form p^2 - p - 1, where p is prime.at n=25A091568
• Number of triangle-free configurations of type (n_3).at n=21A098851
• Primes of the form p^k - p^(k-1) - 1, with p prime and k>1.at n=40A122395
• Primes of the form 4*n^3-5.at n=12A200732
• Greatest number (in decimal representation) with n nonprime substrings in base-3 representation (substrings with leading zeros are considered to be nonprime).at n=33A217113
• Minimal natural number (in decimal representation) with n prime substrings in base-3 representation (substrings with leading zeros are considered to be nonprime).at n=33A217303
• SanD-68 primes p: such that p+d is also prime and sum of digits A007953(p(p+d)) = d, with d = 68.at n=28A307474
• Prime numbersat n=14453