75215

Appears in sequences

• Numbers of the form 49*k, where 49*k+2 and 49*k-6 are both prime.at n=25A153779
• Let p = n-th prime == 3 mod 8; a(n) = (sum of quadratic residues mod p that are < p/2) + (sum of all quadratic residues mod p).at n=23A282727