50231

Properties

Appears in sequences

• Number of rules of a context-free grammar in Chomsky normal form that generates all permutations of n symbols.at n=10A090327
• Base-6 pandigital primes: primes having at least one of each digit 0,1,2,3,4,5 when written in base 6.at n=6A175278
• Smallest k>0 such that q=p+6k, 6kp+q, 6kp-q, 6kq+p and 6kq-p are simultaneously prime, or 0 if no such k exists, where p=A000040(n) is the n-th prime.at n=43A180476
• Primes p such that 2p^2-1, 3p^2-2 and 4p^2-3 are also prime.at n=17A213079
• Primes of the form 2*n^2 + 74*n + 35.at n=19A217500
• Prime numbersat n=5157