58309

Properties

Appears in sequences

• Primes p such that phi(p+1) = phi(p-1).at n=8A067890
• a(n) = k such that the k-th triangular number is A068808(n).at n=28A067991
• Greatest number (in decimal representation) with n nonprime substrings in base-3 representation (substrings with leading zeros are considered to be nonprime).at n=28A217113
• Primes p of the form p = A161671(k) = A161671(k+1).at n=36A220220
• Least prime factor of (4^(2n+1)+1)/5, a(0) = 1.at n=56A299959
• Lesser of 2 successive primes (k, k+4) sandwiching 3 consecutive nonsquarefree numbers.at n=38A366352
• Prime numbersat n=5903