30773

Properties

Appears in sequences

• Numbers k such that the continued fraction for sqrt(k) has period 69.at n=31A020408
• Primes p such that x^49 = 2 has no solution mod p, but x^7 = 2 has a solution mod p.at n=9A059667
• Numbers n such that 9^n - 8^n is prime or a strong pseudoprime.at n=9A059803
• a(n) = floor(Pi^n mod n^Pi).at n=31A066434
• Triangle read by rows: T(n,k) is the number of skew Dyck paths of semilength n and pyramid weight k.at n=51A129163
• Prime numbers p such that p^3 - (p+1)^2 and p^3 + (p+1)^2 are both primes.at n=32A137476
• Primes p such that the multiplicative order of 2 modulo p is (p-1)/7.at n=28A152307
• Number of length n+3 0..4 arrays with every four consecutive terms having the sum of some three elements equal to three times the fourth.at n=37A248533
• Primes p such that each decimal digit of p is equal to the difference of two other digits of p.at n=21A255892
• Primes having only {0, 3, 7} as digits.at n=19A260378
• Primes p such that 2*p+1 and 4*p^2+1 are also prime.at n=37A333803
• Primes p such that, if q is the next prime, p^2 + q is a prime times a power of 10.at n=29A352852
• Primes having only {0, 3, 4, 7} as digits.at n=43A386058
• Primes having only {0, 3, 7, 8} as digits.at n=42A386067
• Prime numbersat n=3318