50858

Appears in sequences

• Numbers whose base-15 representation has exactly 5 runs.at n=7A043672
• Values of n for which pi_{4,3}(p_n) - pi_{4,1}(p_n) = -1, where p_n is the n-th prime and pi_{m,a}(x) is the number of primes <= x which are congruent to a (mod m).at n=26A051024
• a(n) is the sum of quadratic nonresidues of A002145(n) (the n-th prime == 3 mod 4).at n=41A282036
• Let p = n-th prime == 7 mod 8; a(n) = sum of quadratic nonresidues mod p.at n=20A282043