81671

Properties

Appears in sequences

• Indices of prime Lucas numbers.at n=43A001606
• Numbers k such that floor(phi^k) is prime, where phi is the golden ratio.at n=43A059791
• Smallest prime in kx^3+x+5 is prime.at n=13A114369
• Primes p such that floor(phi^p) is prime.at n=39A168033
• Primes of the form 3*m^2 - 4.at n=34A201716
• Numbers n such that the n-th Lucas number is prime and can be written in the form a^2 + 7*b^2.at n=22A216537
• Numbers n such that the n-th Lucas number is prime, but cannot be written in the form a^2 + 3*b^2.at n=18A216555
• Numbers n such that the n-th Lucas number is prime and can be written in the form a^2 + 2*b^2.at n=34A216562
• Numbers n such that the n-th Lucas number is prime, but cannot be written in the form a^2 + 5*b^2.at n=34A216565
• Numbers n such that the n-th Lucas number is prime, but cannot be written in the form a^2 + b^2.at n=26A216566
• Numbers n such that the n-th Lucas number is prime, but cannot be written in the form a^2 + 6*b^2.at n=31A216572
• Numbers n such that n-th Lucas number is prime, but cannot be written in the form a^2 + 10*b^2.at n=23A216576
• Number of partitions of n with up to six distinct kinds of 1.at n=34A320693
• Prime numbersat n=7988