138587

Properties

Appears in sequences

• Numbers k such that k + phi(k) + phi(phi(k)) is a repdigit.at n=26A116027
• Expansion of x/((1 - x - x^4)*(1 - x)^6).at n=17A145135
• Primes p such that continued fraction of (1 + sqrt(p))/2 has period 10 : primes in A146335.at n=35A146355
• a(n) = 121*n^2 - 38*n + 3.at n=33A157443
• Smallest of three consecutive primes whose average is a triangular number.at n=4A226150
• Prime numbersat n=12895