81133

Appears in sequences

• Positive integers k such that k | (12^k + 1).at n=7A015961
• a(n) = a(n-1) + a(n-2) - a(n-4) starting a(0)=0, a(1)=1, a(2)=a(3)=3.at n=37A168637
• Numbers of the form p^2*q, with odd primes p > q, such that q divides p-1.at n=31A350638
• Numbers k such that sigma(k) = psi(k) + tau(k) + omega(k)^3.at n=20A392263